[AMRadio] Huff and Puff my VFO
resend after my first try bounced... Hi all, I have been playing with Huff and Puff VFO circuitry for some time now, and more recently I have purchased a PIC based commercial product from Cumbria design in England. I purchased an inexpensive kit that transforms my Lakeshore Band Hopper VFO drift rate to that approaching DDS stability. See the link below for info specific to my installation: http://pages.prodigy.net/jcandela/Band%20Hopper/ Cumbria design x-lock web page: http://www.cumbriadesigns.co.uk/x-lock.htm The band Hopper VFO runs continuously and covers 5.0-5.6 mhz. These HP stabilizers in general lock a VFO to a frequency band that is +/- so many hz. The Cumbria PIC design I used keeps the Band Hopper within +/- 10 hz, and usually much better than that. Some issues worth noting are: * The VFO lock is disengaged when the drift rate exceeds 40 hz / second, and then locks again in 2 seconds after the knob tuning is done. This can also happen when the VFO takes a jump on it's own from something like a bad tube socket contact, or a large change in filament voltage. With my band Hopper I needed to tighten the tube socket to tube pin contacts, and regulate the filament voltage to exactly 6.0 volts DC. * A vacuum tube variation to the HP requires adaptation of the varactor tuning circuitry. I used dual 1N4005 diodes in series back biased. If I used a varactor diode or led as a voltage variable capacitor, the peak signal level in a tube VFO would overload the diodes when they avalanche. HV diodes like the 1N400x series are good for 5-30pf each at about 0-10 volts back bias (max cap at min voltage). * This design is intended for VFO's that run continuously, and not ones that sit idle until needed. This later category excludes VFO's in many Boat Anchors. There is a variation of the HP that acts like a frequency counter and servo's the VFO to match a desired frequency. Go to Google and search for Huff and Puff VFO. Here is a link at an early HP attempt I tried on the BC-458 VFO: http://pages.prodigy.net/jcandela/Huff%20and%20Puff%20VFO/ Regards, Jim WD5JKO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter
Thanks Ron, I have a partial manual. I think I have it going pretty well. I must learn to interpret the patterns now. 73, John, K5PGW --- K3PID [EMAIL PROTECTED] wrote: Hi John, Do you have the manual? If you like I can send you a pdf of the section describing the installation and operation. K3PID Ron H -- This outgoing email was scanned by Norton Antivirus Corp. Edition and found to be virus free! __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] RE: AMRadio Digest, Vol 49, Issue 35
I seem to remember that the aircraft radios we used during the 60-80s in P-3s/C-130s etc (ARC-94/102 aka 618T) had a selection called AME (AM equivalent). It was explained to us (pilots) by the techs that it wasn't a high level AM, but USB with carrier. It sounded OK, but then again, it was designed for communications and not easy listening! All the airways communication now days is SSB, so the AME position rarely gets selected. Perhaps someone is familiar with that mode and can expand on it. 73 Tom/W4OKW -- Aircraft VHF radios still use full carrier AM. I have a small Radio Shack portable with the aircraft band, and there is a lot of AM traffic on it. I purchased it mainly to use as a tool for sniffing out power line noise. The reason they use AM instead of FM is the capture effect of FM. With AM, when a strong signal is on frequency, a weaker one can still be heard under the stronger one. It would be a catastrophe waiting to happen if aircraft used FM radios and a stronger signal completely overrode, particularly near a busy airport. Also, I seem to recall something about SSB being less than satisfactory due to the shift in frequency due to the Doppler effect, with high speed jet aircraft. Don k4kyv Tom sez-- Hi Don, It probably would have been helpful if I had prefaced my comments with HF Airways (long range over water) comms!! I suspect that the Doppler effect on HF is minimal or SSB wouldn't be universal for HF air to ground today. Back in the day, 6567 KHz was a nearly universal AM frequency shared by Miami, New York and San Juan radio. I don't see any AM frequencies listed in the DOD In-flight Handbook or the ARINC listings. The weather broadcasts like 10051.0 (New York, Gander, Shanwick) are sideband too. I have looked inside several Collins VHF xcvrs (although not the newer Pro-Line stuff) and sure enough they used high level Plate (collector!) modulated AM. I imagine the newer ones use computer generated AM or some such magic!. We (pilots, military and commercial) were taught that FM was not used, as you say, due to the capture effect. With AM when someone doubles, it is pretty obvious. Safety of flight issue. 73 de Tom/W4OKW __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] RE: AMRadio Digest, Vol 49, Issue 37
For the greatest part of aviation Radio, whether it is Civil OR Military - VHF comms are Full AM (DSB w/Carrier). 1) I am a pilot 2) I also have the military ground based receivers. Now the twist! For transoceanic flights, BOTH civil and Military use SSB. Mil runs in the 6, 8, 9, or 11 Mc regions. WX is sent just a bit below the bottom end of 80M - SSB. -- Bob Bethman/NØDGN/BC-610/Northern Radio SP-600 Manassas, VA - MultiBand Dipoles --tom sez Here are some mil (USAF HF Global Comm System)freqs: 4724.0 6739.0 8992.0 11175.0 13200.0 15016.0 and 6712.0 (Croughton only) These are the primary freqs, there are a ton of discretes that are used also. Listen for callsigns, Anderson (Guam), Andrews, Croughton (UK), Lajes (Azores), Scott (IL), MacDill (FL), Incirlik, Sigonella, and others. Civil (ARINC) freqs are numerous depending on the geographical area and may be found on the appropriate ARINC charts or in the DOD Flight Information Handbook. They run from 3-18 MHz (try 3414, 6568, 8864, 8846) If you spend some time listening you will hear the aircraft checking in and receiving backup freqs and Selcall checks (4 tone combos that sound a chime and light a light in the cockpit). Pretty soon you will have a whole list of freqs for the particular family for that area. You can go to the ARINC homepage and look at the HF handbook and find out what all the messages mean. http://www.arinc.com/downloads/13393.pdf By the way, the military uses ARINC for airways (postion reports, clearances, etc) and HF-GCS for command and control. You will hear phone patches from the aircraft to the weather shop at the destination (Andrews Metro (pronounced meetro)this is SAM 27000, request Andrews weather for 2300Z arrival, over), as well as maintenance status reports, etc. A good choice for weather is 10051.0 KHz. NY, Gander and Shanwick transmit weather obs on a rotating basis. Speedbird London (British Airways) used to be on 10093, might still be. Try listening for the coasties (USCG) on 5696.0 Lots of fun things to listen to, out there! 73 de Tom/W4OKW Old pilot and slightly older Ham. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter
Speaking of SB 610's, I have a SB-614 for sale that looks like new. It's just beautiful. Have no idea it's worth, so a fair offer will be accepted. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 W9DVM -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of EP Swynar Sent: Monday, February 11, 2008 11:17 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter Hi John, The SB-610 has been an absolutely invaluable aid here at my stations, in both the CW and voice modes (AM, as well as SSB)... All I do when monitoring 'phone transmissions here is to place the 'scope into a trapezoidal pattern. I adjust the vertical gain such that a carrier makes the line about 2/3 the height of the screen, or so, and the horizontal gain is set so that the modulated triangle is about as equilateral as it can be... When modulating 100%, the pattern should, indeed, be a full, equilateral triangle. One thing that I neglected to do until YEARS later was to pull the top RH knob out --- that's the one marked CLAMP --- whenever using the trapezoidal feature: by doing this, there is no image on the face of the scope until you key-up your transmitter. If you leave the knob in all the time, you'll eventually get a spot burned into the inside face of the CRT, like I did with mine here... The clamp feature keeps the point deflected off-screen into the RH side of the CRT --- as soon as you hit the transmit button on your rig, the line zips out from the right, to the centre of the tube, like magic...! Chalk one up on the importance of reading the instructions first, not later! Hi Hi. ~73~ Eddy VE3CUI - VE3XZ . I can't recall the name of the control because the scop - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Monday, February 11, 2008 10:39 AM Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter
Hi John, The SB-610 has been an absolutely invaluable aid here at my stations, in both the CW and voice modes (AM, as well as SSB)... All I do when monitoring 'phone transmissions here is to place the 'scope into a trapezoidal pattern. I adjust the vertical gain such that a carrier makes the line about 2/3 the height of the screen, or so, and the horizontal gain is set so that the modulated triangle is about as equilateral as it can be... When modulating 100%, the pattern should, indeed, be a full, equilateral triangle. One thing that I neglected to do until YEARS later was to pull the top RH knob out --- that's the one marked CLAMP --- whenever using the trapezoidal feature: by doing this, there is no image on the face of the scope until you key-up your transmitter. If you leave the knob in all the time, you'll eventually get a spot burned into the inside face of the CRT, like I did with mine here... The clamp feature keeps the point deflected off-screen into the RH side of the CRT --- as soon as you hit the transmit button on your rig, the line zips out from the right, to the centre of the tube, like magic...! Chalk one up on the importance of reading the instructions first, not later! Hi Hi. ~73~ Eddy VE3CUI - VE3XZ . I can't recall the name of the control because the scop - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Monday, February 11, 2008 10:39 AM Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Hamcation Report
Probably Orlando. Ed, VA3ES -- EP Swynar wrote: OK, I'll bite...just where, exactly, was this Ham Radio Xanadu, anyway...?! __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter
Hi John, Do you have the manual? If you like I can send you a pdf of the section describing the installation and operation. K3PID Ron H -- This outgoing email was scanned by Norton Antivirus Corp. Edition and found to be virus free! __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Ranger driving SB220
Ron, Yes, the VKII uses a pair of 6146s and it has a 6AQ5 adjustable screen clamp tube. I see no reason to wast power with an attenuator and there is a sweet spot in the final current thru the mod iron that requires a less than full rated final current to avoid saturation. It seems to me that a fine adjust here would allow power reduction for use with an amp and also enable fine tuning the final current without reducing optimum drive current when used barefoot. Just an idea. I like the ability of the DSB transmitters like the HT 37, FT101,etc to lower the output power without having to retune the final. 73, Bill, KB3DKS -Original Message- From: W6OM Good question, I have not restored any Viking II's or set them up to drive an amplifier but as I recall they have a pair of 6146's in the final rather than just one don't they? All the Best Ron Weaver W6OM www.qsl.net/w6om More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Ranger driving SB220
Good question, I have not restored any Viking II's or set them up to drive an amplifier but as I recall they have a pair of 6146's in the final rather than just one don't they? All the Best Ron Weaver W6OM www.qsl.net/w6om -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, February 11, 2008 7:22 PM To: amradio@mailman.qth.net Subject: RE: [AMRadio] Ranger driving SB220 Hello, Would this one knob screen control technique also be a workable option for a VKII, etc, after proper loading/setup into a dummy load? Bill, KB3DKS -Original Message- From: W6OM Pat Leave the mic gain alone, just crank down the screen voltage via a pot inside. I can crank mine down to as little as 7 watts. When I want full power and no amp I open up the crystal socket door and crank it back up. Nothing else really needs to change. All the Best Ron Weaver W6OM www.qsl.net/w6om More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation on AM transmitter
And when you rebuild those HO-10, SB-610s and similar o'scopes, save some money on that high voltage filter capacitor. Allied p/n 343-0231 is 0.22uF 2000VDC 5% tol. with axial leads, and only costs $1.62. 73, Bob W9RAN __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Ranger driving SB220
Hello, Would this one knob screen control technique also be a workable option for a VKII, etc, after proper loading/setup into a dummy load? Bill, KB3DKS -Original Message- From: W6OM Pat Leave the mic gain alone, just crank down the screen voltage via a pot inside. I can crank mine down to as little as 7 watts. When I want full power and no amp I open up the crystal socket door and crank it back up. Nothing else really needs to change. All the Best Ron Weaver W6OM www.qsl.net/w6om More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter
Jim Wilhite wrote: To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Uh... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, kc? you said 3meg(sic). Which is it? it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. So... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Since I wasn't sure, I went looking. http://web.comhem.se/~u87540545/Heathkit/Products/pageSB610.htm Heathkit SB-610 The Heathkit SB-610 monitor scope is primarily designed for monitor the RF-signals, on-the-air signals, from the local transmitter. It can also be used to monitor received signals when connected to a receiver. It monitors RF-envelop, RF-trapezoid and RTTY pattern. SB-610 has also a built-in two-tone sinewave AF-oscillator for SSB-transmitter adjustment. The Monitor-Scope matches the SB-line. -- Driving your AM Rig without a scope, is like driving your car at night, without headlights. (K4KYV) -- 73 = Best Regards, -Geoff/W5OMR __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Ranger driving SB220
It's a good place to start. Here's some more info: http://www.w3am.com/ranger.html You don't have to do anything other than the screen mod if you don't want to. This is just one option for you. g Patrick Thompson wrote: Thanks to all who replied. If I go the route of lowering screen voltage is it enough to lower just the screen on the 6146? And turn the mike gain down? I like the idea of hiding the control shaft behind the crystal cover plug! Pat wa4tuk __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Ranger driving SB220
Thanks to all who replied. If I go the route of lowering screen voltage is it enough to lower just the screen on the 6146? And turn the mike gain down? I like the idea of hiding the control shaft behind the crystal cover plug! Pat wa4tuk -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gary Blau Sent: Monday, February 11, 2008 7:45 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Ranger driving SB220 You can lower the power in a couple different ways. Lower the screen, run the PA on the low HV, attenuate the RF, etc. If you're driving an amp there's no advantage to running full power in the Ranger. In fact, you give up a lot of potential positive peak modulation capability, if that's important to you. I vote for lowering the screen and making it adjustable. Second would be running the PA on the lower HV rail. There are numerous articles on line for modifying the Ranger to do these things. g Patrick Thompson wrote: How did you go about getting the RF drive from the Ranger down to a level usable by the SB220? I'm thinking about something similar to get to the 200-250 watt carrier level (or 800 to 1000 pep AM). I'm guessing the amp won't need much more than 10-15 watts drive (40 to 60 watts pep AM) leaving a little headroom. I thought about a homemade pad but that's a lot of heat to throw away. Maybe a 3db pad and turn the drive down a little? I could lower the screen voltage but it would be nice to have the rig full power when barefoot. Can you get by with just lowering the drive and microphone gain? Pat wa4tuk __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1272 - Release Date: 2/11/2008 5:28 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1272 - Release Date: 2/11/2008 5:28 PM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Fw: [Gonset] Fw: Dayton 2008 Flea Market
- Original Message - From: Larry WA9VRH [EMAIL PROTECTED] To: Gonset Mail List [EMAIL PROTECTED] Sent: Monday, February 11, 2008 5:56 PM Subject: [Gonset] Fw: Dayton 2008 Flea Market - Original Message - From: Larry WA9VRH [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, February 11, 2008 5:52 PM Subject: Dayton 2008 Flea Market Hi all, After talking to a number of people it appears that the Dayton folks are not sending out via mail the information for the flea market. So if you go here: http://www.hamvention.org/hv2008/flea/index.html You can print out the application for the flea market and mail it in. I have also been told that the some of the links don't work and so it appears that the mail is the best choice. Not bad mouthing the Dayton crew but just want to see you all there. 73 Larry WA9VRH spaces 1943-1944 ___ Gonset mailing list [EMAIL PROTECTED] http://mailman.qth.net/mailman/listinfo/gonset __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation on AM transmitter
John The SB 610 monitor scope is one of the best all around performers for the money you can still buy today. I have two, one connected to the plate of the 2nd IF on an NC 300 for monitoring the incoming signals and for transmit it monitors a Ranger driving an SB 220 on AM. The second on is connected to the grid of the 2nd detector stage on my 75A4 to monitor incoming signals and also watch my transmit signal on a Bauer 707 converted to 75 meters. Hard to imagine a more versatile inexpensive monitor scope available now days as they sell for anywhere from $60.00 to $80.00 on eBay and else where. If the face plate is good, cabinet paint is available from a couple of sources and if needed to match a vintage IF strip 455Khz IF cans are cheap and plentiful at Tubes and More in Phoenix for less than $3.00. One word of caution, every one I have owned has had the 1600V mylar caps go bad, so if you buy an SB610 order some replacements ($12.00 from Mouser) and replace them first. Enjoy All the Best Ron Weaver W6OM www.qsl.net/w6om -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John King Sent: Monday, February 11, 2008 7:39 AM To: amradio@mailman.qth.net Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation on AM transmitter Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor ScopetomonitormodulationonAM transmitter
I paid $125 for my SB-614 five years ago. Bob Macklin K5MYJ Seattle, Wa, Real Radios Glow in the Dark - Original Message - From: Phil LaMarche [EMAIL PROTECTED] To: 'Discussion of AM Radio in the Amateur Service' amradio@mailman.qth.net Sent: Monday, February 11, 2008 8:41 AM Subject: RE: [AMRadio] Using Heath SB 610 Monitor ScopetomonitormodulationonAM transmitter Can anyone on the list give me the worth of the SB-614? It's like new. Many thanks. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 W9DVM -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Barrie Smith Sent: Monday, February 11, 2008 11:33 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope tomonitormodulationonAM transmitter Phil: Is that similar to the 610? If so, I would be interested. I have not idea what it's worth, either. I've wanted a monitor scope for some time so give me an idea what you want for it. 73, Barrie, W7ALW - Original Message - From: Phil LaMarche [EMAIL PROTECTED] To: 'Discussion of AM Radio in the Amateur Service' amradio@mailman.qth.net Sent: Monday, February 11, 2008 9:24 AM Subject: RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter Speaking of SB 610's, I have a SB-614 for sale that looks like new. It's just beautiful. Have no idea it's worth, so a fair offer will be accepted. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 W9DVM -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of EP Swynar Sent: Monday, February 11, 2008 11:17 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter Hi John, The SB-610 has been an absolutely invaluable aid here at my stations, in both the CW and voice modes (AM, as well as SSB)... All I do when monitoring 'phone transmissions here is to place the 'scope into a trapezoidal pattern. I adjust the vertical gain such that a carrier makes the line about 2/3 the height of the screen, or so, and the horizontal gain is set so that the modulated triangle is about as equilateral as it can be... When modulating 100%, the pattern should, indeed, be a full, equilateral triangle. One thing that I neglected to do until YEARS later was to pull the top RH knob out --- that's the one marked CLAMP --- whenever using the trapezoidal feature: by doing this, there is no image on the face of the scope until you key-up your transmitter. If you leave the knob in all the time, you'll eventually get a spot burned into the inside face of the CRT, like I did with mine here... The clamp feature keeps the point deflected off-screen into the RH side of the CRT --- as soon as you hit the transmit button on your rig, the line zips out from the right, to the centre of the tube, like magic...! Chalk one up on the importance of reading the instructions first, not later! Hi Hi. ~73~ Eddy VE3CUI - VE3XZ . I can't recall the name of the control because the scop - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Monday, February 11, 2008 10:39 AM Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter
Let me know what you want for it Phil I am interested. Joe - Original Message - From: Phil LaMarche [EMAIL PROTECTED] To: 'Discussion of AM Radio in the Amateur Service' amradio@mailman.qth.net Sent: Monday, February 11, 2008 11:24 AM Subject: RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter Speaking of SB 610's, I have a SB-614 for sale that looks like new. It's just beautiful. Have no idea it's worth, so a fair offer will be accepted. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 W9DVM -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of EP Swynar Sent: Monday, February 11, 2008 11:17 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter Hi John, The SB-610 has been an absolutely invaluable aid here at my stations, in both the CW and voice modes (AM, as well as SSB)... All I do when monitoring 'phone transmissions here is to place the 'scope into a trapezoidal pattern. I adjust the vertical gain such that a carrier makes the line about 2/3 the height of the screen, or so, and the horizontal gain is set so that the modulated triangle is about as equilateral as it can be... When modulating 100%, the pattern should, indeed, be a full, equilateral triangle. One thing that I neglected to do until YEARS later was to pull the top RH knob out --- that's the one marked CLAMP --- whenever using the trapezoidal feature: by doing this, there is no image on the face of the scope until you key-up your transmitter. If you leave the knob in all the time, you'll eventually get a spot burned into the inside face of the CRT, like I did with mine here... The clamp feature keeps the point deflected off-screen into the RH side of the CRT --- as soon as you hit the transmit button on your rig, the line zips out from the right, to the centre of the tube, like magic...! Chalk one up on the importance of reading the instructions first, not later! Hi Hi. ~73~ Eddy VE3CUI - VE3XZ . I can't recall the name of the control because the scop - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Monday, February 11, 2008 10:39 AM Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Ranger driving SB220
How did you go about getting the RF drive from the Ranger down to a level usable by the SB220? I'm thinking about something similar to get to the 200-250 watt carrier level (or 800 to 1000 pep AM). I'm guessing the amp won't need much more than 10-15 watts drive (40 to 60 watts pep AM) leaving a little headroom. I thought about a homemade pad but that's a lot of heat to throw away. Maybe a 3db pad and turn the drive down a little? I could lower the screen voltage but it would be nice to have the rig full power when barefoot. Can you get by with just lowering the drive and microphone gain? Pat wa4tuk -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of W6OM Sent: Monday, February 11, 2008 12:10 PM To: 'Discussion of AM Radio in the Amateur Service' Subject: RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation on AM transmitter John The SB 610 monitor scope is one of the best all around performers for the money you can still buy today. I have two, one connected to the plate of the 2nd IF on an NC 300 for monitoring the incoming signals and for transmit it monitors a Ranger driving an SB 220 on AM. snip No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1272 - Release Date: 2/11/2008 5:28 PM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter
To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. Jim/W5JO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Hamcation Report
Ed, Heh, sorry abt that. The Hamcation was, and will be next year, in Orlando, FL. Truly a mini Dayton. Just enough of everything to keep things interesting. It was 73 degrees when I left there yesterday. de KA4JVY Mark Darn small world - even smaller when it comes to things Corvair. - Original Message From: EP Swynar [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Monday, February 11, 2008 7:47:34 AM Subject: Re: [AMRadio] Hamcation Report Hi Mark, OK, I'll bite...just where, exactly, was this Ham Radio Xanadu, anyway...?! ~73~ Eddy VE3CUI - VE3XZ * - Original Message - From: Mark Foltarz [EMAIL PROTECTED] To: amradio@mailman.qth.net; amradio@mailman.qth.net Sent: Sunday, February 10, 2008 8:23 PM Subject: [AMRadio] Hamcation Report Group, There were a ton of good deals on rigs. Cheap ,older, HF rice boxes ( AM capable) for some truly bargin prices. The weather was a little on the cold side. I picked up another GPR 90. Bought and sold some WWII stuff. Had to get one of those 30 ft fiberglass pole kits for field day. Bought bits and pieces for several projects. Overall great weekend. de KA4JVY Mark Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Hamcation Report
Hi Mark, OK, I'll bite...just where, exactly, was this Ham Radio Xanadu, anyway...?! ~73~ Eddy VE3CUI - VE3XZ * - Original Message - From: Mark Foltarz [EMAIL PROTECTED] To: amradio@mailman.qth.net; amradio@mailman.qth.net Sent: Sunday, February 10, 2008 8:23 PM Subject: [AMRadio] Hamcation Report Group, There were a ton of good deals on rigs. Cheap ,older, HF rice boxes ( AM capable) for some truly bargin prices. The weather was a little on the cold side. I picked up another GPR 90. Bought and sold some WWII stuff. Had to get one of those 30 ft fiberglass pole kits for field day. Bought bits and pieces for several projects. Overall great weekend. de KA4JVY Mark Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope tomonitor modulationonAM transmitter
It's my impression after reading the SB-610 manual the SB-610 vertical input can be wired for RTTY or RF envelope of the receiver IF. I assume in this case the sweep generator is wired to the horizontal channel. I have no idea how mine is wired. I assume that one uses the RTTY position of the mode selector to display the receiver IF envelope. This does not seem to be very useful when monitoring a SSB receiver. - Original Message - From: Geoff/W5OMR [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Monday, February 11, 2008 7:18 PM Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope tomonitor modulationonAM transmitter Jim Wilhite wrote: To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Uh... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, kc? you said 3meg(sic). Which is it? it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. So... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Since I wasn't sure, I went looking. http://web.comhem.se/~u87540545/Heathkit/Products/pageSB610.htm Heathkit SB-610 The Heathkit SB-610 monitor scope is primarily designed for monitor the RF-signals, on-the-air signals, from the local transmitter. It can also be used to monitor received signals when connected to a receiver. It monitors RF-envelop, RF-trapezoid and RTTY pattern. SB-610 has also a built-in two-tone sinewave AF-oscillator for SSB-transmitter adjustment. The Monitor-Scope matches the SB-line. -- Driving your AM Rig without a scope, is like driving your car at night, without headlights. (K4KYV) -- 73 = Best Regards, -Geoff/W5OMR __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Ranger driving SB220
Well, I'm telling a story on myself. I had looked at your page before and added it to a folder with Ranger related info from several places on the web and BAMA, etc. I've been fixing various things as I go through this rig. The latest item I was concerned with was the modulator current (way too high). So I was looking to see what other people had done and looked over the grid biasing for the modulator but missed the variable screen voltage power control (a future project). It used to be routine to try to get 120% positive modulation in broadcast AM service. Still not a bad goal. Thanks! Pat wa4tuk -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gary Blau Sent: Monday, February 11, 2008 9:39 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Ranger driving SB220 It's a good place to start. Here's some more info: http://www.w3am.com/ranger.html You don't have to do anything other than the screen mod if you don't want to. This is just one option for you. g Patrick Thompson wrote: Thanks to all who replied. If I go the route of lowering screen voltage is it enough to lower just the screen on the 6146? And turn the mike gain down? I like the idea of hiding the control shaft behind the crystal cover plug! Pat wa4tuk __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1272 - Release Date: 2/11/2008 5:28 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1272 - Release Date: 2/11/2008 5:28 PM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] FS: HT-20, WRL 755A
For Sale Hallicrafters HT-20 transmitter. This is all original except for some paint funnies on the front panel. It must have had some rack rash around the screw holes so the owner decided to paint a 1 inch black band down each side. He also tried touching up the front panel gray around one screw head. And there's a couple very small scrapes in the paint on the panel too. But it has no holes, all original knobs, and looks pretty sharp. The original cabinet paint is good, with some scrapes and scuffs including 1 or 2 at the front cabinet edge. Complete, untested and as-is. This weighs 80-100 pounds. You can pick it up in Pittsburgh or I will ship it double boxed at your expense. With original manual. Please make an offer. WRL 755a HF VFO with 160 meters on it. Dandy original cosmetic condition, though it needs cleaned. dial plastic has yellowed but has no cracks, chips or frosting. Tuning is stiff. Widely agreed to be the best of the commercial HF VFOs. Untested and as-is. $189 plus shipping. Thanks for looking. 73, Don Merz, N3RHT __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Ranger driving SB220
Thanks Pat others who wrote concerning how I use a Ranger to drive an SB-220. Here is a list from my archives of things I tried. 1. The much touted pot to crank down the screen voltage. Simple, easy mod. Use a non conductive shaft, bring it out through the hole in the crystal socket and you can still insert a crystal, pot the cap back on and crack it all the way up when you want to. 2. Simply using less grid drive when tuning up the Ranger, bad idea, my linearity goes to hell. 3. Built a 3db attenuation pad with a hand full of one watt resistors, a couple of coax connectors a box and a switch. Got way too hot 6. Built a 6db attention pad with a hand full of 5 watt resistors, a couple of coax connectors a box and switch. Found the sweet spot 7. If you don't want to build an attenuator or mod the Ranger, surplus attenuators are plentiful and on eBay, Surplus sales of Nebraska and I am sure countless other places. All the Best Ron Weaver W6OM www.qsl.net/w6om -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Patrick Thompson Sent: Monday, February 11, 2008 4:37 PM To: 'Discussion of AM Radio in the Amateur Service' Subject: [AMRadio] Ranger driving SB220 How did you go about getting the RF drive from the Ranger down to a level usable by the SB220? I'm thinking about something similar to get to the 200-250 watt carrier level (or 800 to 1000 pep AM). I'm guessing the amp won't need much more than 10-15 watts drive (40 to 60 watts pep AM) leaving a little headroom. I thought about a homemade pad but that's a lot of heat to throw away. Maybe a 3db pad and turn the drive down a little? I could lower the screen voltage but it would be nice to have the rig full power when barefoot. Can you get by with just lowering the drive and microphone gain? Pat wa4tuk -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of W6OM Sent: Monday, February 11, 2008 12:10 PM To: 'Discussion of AM Radio in the Amateur Service' Subject: RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation on AM transmitter John The SB 610 monitor scope is one of the best all around performers for the money you can still buy today. I have two, one connected to the plate of the 2nd IF on an NC 300 for monitoring the incoming signals and for transmit it monitors a Ranger driving an SB 220 on AM. snip No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1272 - Release Date: 2/11/2008 5:28 PM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter
The Vertical input on the SB-614 is totally different then what's found in the SB-610. The SB-610 vertical input (for connecting to the IF output) circuitry has three front end choices. From 1 KHz to 150 KHz, no input or output coils are required. From 455 KHz to 2475 KHz, there in an output coil. For 3000 KHz to 6000 KHz, both an input and output coil are required. The SB-620 not only has three separate mixer input choices, depending on input frequency, but there are also changes required in the sweep circuitry depending on the input frequency. Pete, wa2cwa http://wwwmanualman.com On Mon, 11 Feb 2008 16:20:15 -0800 Bob Macklin [EMAIL PROTECTED] writes: I think you have the SB-610 and SB-614 confused with the SB-620 Panadapter. What you state is true of the SB-620. Bob Macklin K5MYJ Seattle, Wa, Real Radios Glow in the Dark - Original Message - From: Jim Wilhite [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Monday, February 11, 2008 3:49 PM Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. Jim/W5JO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Ranger driving SB220
There was a great article in Electric Radio (Issue 139, Dec 2000, page 25) on modifying the Ranger screen voltage with a variable control, and even access from the front panel, without drilling any holes in the front panel. Works great. Pete, wa2cwa On Mon, 11 Feb 2008 19:44:53 -0500 Gary Blau [EMAIL PROTECTED] writes: You can lower the power in a couple different ways. Lower the screen, run the PA on the low HV, attenuate the RF, etc. If you're driving an amp there's no advantage to running full power in the Ranger. In fact, you give up a lot of potential positive peak modulation capability, if that's important to you. I vote for lowering the screen and making it adjustable. Second would be running the PA on the lower HV rail. There are numerous articles on line for modifying the Ranger to do these things. g Patrick Thompson wrote: How did you go about getting the RF drive from the Ranger down to a level usable by the SB220? I'm thinking about something similar to get to the 200-250 watt carrier level (or 800 to 1000 pep AM). I'm guessing the amp won't need much more than 10-15 watts drive (40 to 60 watts pep AM) leaving a little headroom. I thought about a homemade pad but that's a lot of heat to throw away. Maybe a 3db pad and turn the drive down a little? I could lower the screen voltage but it would be nice to have the rig full power when barefoot. Can you get by with just lowering the drive and microphone gain? Pat wa4tuk __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Using Heath SB 610 Monitor Scope tomonitormodulationonAM transmitter
Can anyone on the list give me the worth of the SB-614? It's like new. Many thanks. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 W9DVM -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Barrie Smith Sent: Monday, February 11, 2008 11:33 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope tomonitormodulationonAM transmitter Phil: Is that similar to the 610? If so, I would be interested. I have not idea what it's worth, either. I've wanted a monitor scope for some time so give me an idea what you want for it. 73, Barrie, W7ALW - Original Message - From: Phil LaMarche [EMAIL PROTECTED] To: 'Discussion of AM Radio in the Amateur Service' amradio@mailman.qth.net Sent: Monday, February 11, 2008 9:24 AM Subject: RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter Speaking of SB 610's, I have a SB-614 for sale that looks like new. It's just beautiful. Have no idea it's worth, so a fair offer will be accepted. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 W9DVM -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of EP Swynar Sent: Monday, February 11, 2008 11:17 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter Hi John, The SB-610 has been an absolutely invaluable aid here at my stations, in both the CW and voice modes (AM, as well as SSB)... All I do when monitoring 'phone transmissions here is to place the 'scope into a trapezoidal pattern. I adjust the vertical gain such that a carrier makes the line about 2/3 the height of the screen, or so, and the horizontal gain is set so that the modulated triangle is about as equilateral as it can be... When modulating 100%, the pattern should, indeed, be a full, equilateral triangle. One thing that I neglected to do until YEARS later was to pull the top RH knob out --- that's the one marked CLAMP --- whenever using the trapezoidal feature: by doing this, there is no image on the face of the scope until you key-up your transmitter. If you leave the knob in all the time, you'll eventually get a spot burned into the inside face of the CRT, like I did with mine here... The clamp feature keeps the point deflected off-screen into the RH side of the CRT --- as soon as you hit the transmit button on your rig, the line zips out from the right, to the centre of the tube, like magic...! Chalk one up on the importance of reading the instructions first, not later! Hi Hi. ~73~ Eddy VE3CUI - VE3XZ . I can't recall the name of the control because the scop - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Monday, February 11, 2008 10:39 AM Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home:
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter
Phil: Is that similar to the 610? If so, I would be interested. I have not idea what it's worth, either. I've wanted a monitor scope for some time so give me an idea what you want for it. 73, Barrie, W7ALW - Original Message - From: Phil LaMarche [EMAIL PROTECTED] To: 'Discussion of AM Radio in the Amateur Service' amradio@mailman.qth.net Sent: Monday, February 11, 2008 9:24 AM Subject: RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter Speaking of SB 610's, I have a SB-614 for sale that looks like new. It's just beautiful. Have no idea it's worth, so a fair offer will be accepted. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 W9DVM -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of EP Swynar Sent: Monday, February 11, 2008 11:17 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter Hi John, The SB-610 has been an absolutely invaluable aid here at my stations, in both the CW and voice modes (AM, as well as SSB)... All I do when monitoring 'phone transmissions here is to place the 'scope into a trapezoidal pattern. I adjust the vertical gain such that a carrier makes the line about 2/3 the height of the screen, or so, and the horizontal gain is set so that the modulated triangle is about as equilateral as it can be... When modulating 100%, the pattern should, indeed, be a full, equilateral triangle. One thing that I neglected to do until YEARS later was to pull the top RH knob out --- that's the one marked CLAMP --- whenever using the trapezoidal feature: by doing this, there is no image on the face of the scope until you key-up your transmitter. If you leave the knob in all the time, you'll eventually get a spot burned into the inside face of the CRT, like I did with mine here... The clamp feature keeps the point deflected off-screen into the RH side of the CRT --- as soon as you hit the transmit button on your rig, the line zips out from the right, to the centre of the tube, like magic...! Chalk one up on the importance of reading the instructions first, not later! Hi Hi. ~73~ Eddy VE3CUI - VE3XZ . I can't recall the name of the control because the scop - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Monday, February 11, 2008 10:39 AM Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an
Re: [AMRadio] Ranger driving SB220
You can lower the power in a couple different ways. Lower the screen, run the PA on the low HV, attenuate the RF, etc. If you're driving an amp there's no advantage to running full power in the Ranger. In fact, you give up a lot of potential positive peak modulation capability, if that's important to you. I vote for lowering the screen and making it adjustable. Second would be running the PA on the lower HV rail. There are numerous articles on line for modifying the Ranger to do these things. g Patrick Thompson wrote: How did you go about getting the RF drive from the Ranger down to a level usable by the SB220? I'm thinking about something similar to get to the 200-250 watt carrier level (or 800 to 1000 pep AM). I'm guessing the amp won't need much more than 10-15 watts drive (40 to 60 watts pep AM) leaving a little headroom. I thought about a homemade pad but that's a lot of heat to throw away. Maybe a 3db pad and turn the drive down a little? I could lower the screen voltage but it would be nice to have the rig full power when barefoot. Can you get by with just lowering the drive and microphone gain? Pat wa4tuk __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter
What do you need to know about using the SB-610 for AM? Bob Macklin K5MYJ Seattle, Wa, Real Radios Glow in the Dark - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Monday, February 11, 2008 7:39 AM Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter
I think you have the SB-610 and SB-614 confused with the SB-620 Panadapter. What you state is true of the SB-620. Bob Macklin K5MYJ Seattle, Wa, Real Radios Glow in the Dark - Original Message - From: Jim Wilhite [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Monday, February 11, 2008 3:49 PM Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. Jim/W5JO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter
SB-614 will display an audio signal as I recall...just loop our audio through it on receive... Screen is also quite small... SB-610 and HO-10 are the Hot Setup 73, Warren W1GUD On Feb 11, 2008, at 8:58 PM, Peter Markavage wrote: The Vertical input on the SB-614 is totally different then what's found in the SB-610. The SB-610 vertical input (for connecting to the IF output) circuitry has three front end choices. From 1 KHz to 150 KHz, no input or output coils are required. From 455 KHz to 2475 KHz, there in an output coil. For 3000 KHz to 6000 KHz, both an input and output coil are required. The SB-620 not only has three separate mixer input choices, depending on input frequency, but there are also changes required in the sweep circuitry depending on the input frequency. Pete, wa2cwa http://wwwmanualman.com On Mon, 11 Feb 2008 16:20:15 -0800 Bob Macklin [EMAIL PROTECTED] writes: I think you have the SB-610 and SB-614 confused with the SB-620 Panadapter. What you state is true of the SB-620. Bob Macklin K5MYJ Seattle, Wa, Real Radios Glow in the Dark - Original Message - From: Jim Wilhite [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Monday, February 11, 2008 3:49 PM Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitormodulationonAM transmitter To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. Jim/W5JO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter
Thanks Jim You make excellent and insight points as always. I have encountered the issues you speak about in interfacing my 610's with various vintage receivers like my NC-300 and 75A4. Thank goodness that I stumbled across small 455Khz and other frequencies IF cans at Antique Electronics Supply in Phoenix. With some minor surgery both 610's are monitoring received signals on my receivers. On the NC-300 I went directly to the plate of the 2nd IF and coupled it through a 5PF mica. On the 75A4 I went to the grid of the 2nd detector tube and used 4.3 PF mica. Both have full deflection and ad a bit of fun to monitoring by being able to see the everyone's signal. But then, it has been mentioned from time to time that I am a tad obsessive about these beautiful old boat anchors. Cheers my friend Ron Weaver W6OM www.qsl.net/w6om -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Geoff/W5OMR Sent: Monday, February 11, 2008 7:19 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter Jim Wilhite wrote: To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Uh... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, kc? you said 3meg(sic). Which is it? it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. So... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Since I wasn't sure, I went looking. http://web.comhem.se/~u87540545/Heathkit/Products/pageSB610.htm Heathkit SB-610 The Heathkit SB-610 monitor scope is primarily designed for monitor the RF-signals, on-the-air signals, from the local transmitter. It can also be used to monitor received signals when connected to a receiver. It monitors RF-envelop, RF-trapezoid and RTTY pattern. SB-610 has also a built-in two-tone sinewave AF-oscillator for SSB-transmitter adjustment. The Monitor-Scope matches the SB-line. -- Driving your AM Rig without a scope, is like driving your car at night, without headlights. (K4KYV) -- 73 = Best Regards, -Geoff/W5OMR __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation on AM transmitter
Anyone experienced at using Heath SB 610 Monitor Scope to monitor the modulation pattern of the outgoing signal of an AM transmitter? I need to have session to discuss the application of the SB 610 to that operation. Please email me directly for such a discussion. Your assistance in understanding the application and process will be greatly appreciated. Thanks and 73, John, K5PGW Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Hamcation Report
EP Swynar wrote: Hi Mark, OK, I'll bite...just where, exactly, was this Ham Radio Xanadu, anyway...?! Google says go see www.hamcation.com -- Driving your AM Rig without a scope, is like driving your car at night, without headlights. (K4KYV) -- 73 = Best Regards, -Geoff/W5OMR __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Ranger driving SB220
Pat Leave the mic gain alone, just crank down the screen voltage via a pot inside. I can crank mine down to as little as 7 watts. When I want full power and no amp I open up the crystal socket door and crank it back up. Nothing else really needs to change. All the Best Ron Weaver W6OM www.qsl.net/w6om -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Patrick Thompson Sent: Monday, February 11, 2008 6:20 PM To: 'Discussion of AM Radio in the Amateur Service' Subject: RE: [AMRadio] Ranger driving SB220 Thanks to all who replied. If I go the route of lowering screen voltage is it enough to lower just the screen on the 6146? And turn the mike gain down? I like the idea of hiding the control shaft behind the crystal cover plug! Pat wa4tuk -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gary Blau Sent: Monday, February 11, 2008 7:45 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Ranger driving SB220 You can lower the power in a couple different ways. Lower the screen, run the PA on the low HV, attenuate the RF, etc. If you're driving an amp there's no advantage to running full power in the Ranger. In fact, you give up a lot of potential positive peak modulation capability, if that's important to you. I vote for lowering the screen and making it adjustable. Second would be running the PA on the lower HV rail. There are numerous articles on line for modifying the Ranger to do these things. g Patrick Thompson wrote: How did you go about getting the RF drive from the Ranger down to a level usable by the SB220? I'm thinking about something similar to get to the 200-250 watt carrier level (or 800 to 1000 pep AM). I'm guessing the amp won't need much more than 10-15 watts drive (40 to 60 watts pep AM) leaving a little headroom. I thought about a homemade pad but that's a lot of heat to throw away. Maybe a 3db pad and turn the drive down a little? I could lower the screen voltage but it would be nice to have the rig full power when barefoot. Can you get by with just lowering the drive and microphone gain? Pat wa4tuk __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1272 - Release Date: 2/11/2008 5:28 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.2/1272 - Release Date: 2/11/2008 5:28 PM __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Ranger driving SB220
Thanks Bill I don't have a schematic of a VII but it seems rational to assume the same type of mod would work in it. Let me know what you end up doing. All the Best Ron Weaver W6OM www.qsl.net/w6om -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, February 11, 2008 7:48 PM To: amradio@mailman.qth.net Subject: RE: [AMRadio] Ranger driving SB220 Ron, Yes, the VKII uses a pair of 6146s and it has a 6AQ5 adjustable screen clamp tube. I see no reason to wast power with an attenuator and there is a sweet spot in the final current thru the mod iron that requires a less than full rated final current to avoid saturation. It seems to me that a fine adjust here would allow power reduction for use with an amp and also enable fine tuning the final current without reducing optimum drive current when used barefoot. Just an idea. I like the ability of the DSB transmitters like the HT 37, FT101,etc to lower the output power without having to retune the final. 73, Bill, KB3DKS -Original Message- From: W6OM Good question, I have not restored any Viking II's or set them up to drive an amplifier but as I recall they have a pair of 6146's in the final rather than just one don't they? All the Best Ron Weaver W6OM www.qsl.net/w6om More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Ranger driving SB220
Patrick Thompson wrote: How did you go about getting the RF drive from the Ranger down to a level usable by the SB220? [...] I thought about a homemade pad but that's a lot of heat to throw away. Maybe a 3db pad and turn the drive down a little? AE5AW/Bill, in San Angelo, TX, inserted a roll of 50ohm coax between the Ranger I and the grid input of his GU-76 amp. He gets around 6 watts of carrier out of it, and the station sure sounds good from out in West Texas! I could lower the screen voltage but it would be nice to have the rig full power when barefoot. You could wire in a big pot, to vary the screen voltage. -- Driving your AM Rig without a scope, is like driving your car at night, without headlights. (K4KYV) -- 73 = Best Regards, -Geoff/W5OMR __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope tomonitormodulationonAM transmitter
Bingo you are right Bob. I just traded my 620 and did have them backwards. The 620 requires a connection to the IF of the receiver. Jim/W5JO I think you have the SB-610 and SB-614 confused with the SB-620 Panadapter. What you state is true of the SB-620. Bob Macklin K5MYJ __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
