[Drakelist] USB/LSB Indicator Lens
Hello, I need to replace one of the red USB/LSB indicator lenses on a TR-4C faceplate. Does anyone know of a source for these? Thanks, Wyatt – W4MUO ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] TR-7 no transmit
Power up, good receive on short 20' wire, s-3 steady, couple of jumps to s-5 on strong 20 meter signal. S-meter drops to zero, and no movement on w-7 meter on transmit test, two differet 7077, A-104 mics.(300 watt drake dummy attached to W7) mid 3k range, all late boards, including aux7, NB, 2nd IF, only early is on the PA, small board, have a late series pa brick, and several assorted boards as spares. Before start-up, carefully pulled, de-oxit pins, and several re-seatings all topside boards, and hit the band switches also first with kroil and then with de-oxit, as start. VFO now very smooth and easy turning. Cured the aux7 of 3 bands changing displays routine. Frequency rock solid stable, except .9/0. can flicker back and forth on a very small spot...LOL Since my gear is very limited, any suggestions as to board swaps as a testing bed would be welcome, Starting as to whether the pa brick might be a good start? Probably missing several, but can try the ones I have. I'd rather spend a few hours on this then merely send it out somewheres,..at least maybe narrow it down some. Maybe get lucky! Last night, heard a signal out of Japan and Europe, S3, Boston boomed in S5. S-3 barely audible on speaker, but my hearing pretty poor, earphones help a lot. on 20' of #12 house wire up a floor and across the ceiling a ways. Meanwhile, will spend some time in the service manual, read it carefully through, and bookmark starting points. Time to see if the heatkit testing rig Vxxx works, and look over that manual, also. Fluke 87, screwdriver, and extender board set on hand. Not in a hurry. Good break in weather today, 40's. One of the pigs jumped? over the 18 of fence above the 2 1/2 ft of hardpack, and went shoulder deep in 3' unpacked snow. Poor piggy didn't go far, backed up after less than 15' and climbed back into the pen, urged on by the other pig happily slurping down alone the 2nd pail of warm feed and some hot boiled potatoes. They do like to eat...Yorkshires, 18 months now, getting pretty big. Ever see the cartoon movie, Pigs is Pigs Disney, I think...digressing 73'a ken AB1JZ p.s. some might be interested in this: Egypt Influence Network, from Egypt tweetgrid postings on tb2k, pg 105? of the series ofnear continuous coverage. http://www.kovasboguta.com/uploads/4/7/9/5/4795292/egyptinfluencenetwork.pdf This is high res version, and is a small indication of what monitoring and computers can do. My biggest surprise this is in the open... _ Netscape. Just the Net You Need. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR-7 no transmit
Ken, Have you tried CW mode to see if it is related to the audio chain vs more or less just the RF chain? 73, Ron WD8SBB --- On Fri, 2/18/11, kendw...@netscape.com kendw...@netscape.com wrote: From: kendw...@netscape.com kendw...@netscape.com Subject: [Drakelist] TR-7 no transmit To: drakelist@zerobeat.net Date: Friday, February 18, 2011, 4:56 PM Power up, good receive on short 20' wire, s-3 steady, couple of jumps to s-5 on strong 20 meter signal. S-meter drops to zero, and no movement on w-7 meter on transmit test, two differet 7077, A-104 mics.(300 watt drake dummy attached to W7) mid 3k range, all late boards, including aux7, NB, 2nd IF, only early is on the PA, small board, have a late series pa brick, and several assorted boards as spares. Before start-up, carefully pulled, de-oxit pins, and several re-seatings all topside boards, and hit the band switches also first with kroil and then with de-oxit, as start. VFO now very smooth and easy turning. Cured the aux7 of 3 bands changing displays routine. Frequency rock solid stable, except .9/0. can flicker back and forth on a very small spot...LOL Since my gear is very limited, any suggestions as to board swaps as a testing bed would be welcome, Starting as to whether the pa brick might be a good start? Probably missing several, but can try the ones I have. I'd rather spend a few hours on this then merely send it out somewheres,..at least maybe narrow it down some. Maybe get lucky! Last night, heard a signal out of Japan and Europe, S3, Boston boomed in S5. S-3 barely audible on speaker, but my hearing pretty poor, earphones help a lot. on 20' of #12 house wire up a floor and across the ceiling a ways. Meanwhile, will spend some time in the service manual, read it carefully through, and bookmark starting points. Time to see if the heatkit testing rig Vxxx works, and look over that manual, also. Fluke 87, screwdriver, and extender board set on hand. Not in a hurry. Good break in weather today, 40's. One of the pigs jumped? over the 18 of fence above the 2 1/2 ft of hardpack, and went shoulder deep in 3' unpacked snow. Poor piggy didn't go far, backed up after less than 15' and climbed back into the pen, urged on by the other pig happily slurping down alone the 2nd pail of warm feed and some hot boiled potatoes. They do like to eat...Yorkshires, 18 months now, getting pretty big. Ever see the cartoon movie, Pigs is Pigs Disney, I think...digressing 73'a ken AB1JZ p.s. some might be interested in this: Egypt Influence Network, from Egypt tweetgrid postings on tb2k, pg 105? of the series ofnear continuous coverage. http://www.kovasboguta.com/uploads/4/7/9/5/4795292/egyptinfluencenetwork.pdf This is high res version, and is a small indication of what monitoring and computers can do. My biggest surprise this is in the open... _ Netscape. Just the Net You Need. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR-7 no transmit
On Fri, 18 Feb 2011 13:56:25 -0800, kendw...@netscape.com wrote: S-meter drops to zero, and no movement on w-7 meter on transmit test, two differet 7077, A-104 mics. Any output in CW or AM? 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime. HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Fwd: First Jet Flight
can anyone identify the radio the ground crew is using? mickey wa6fiz http://videosift.com/video/Americas-First-Jet-Flight-October-1942 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] PTO/VFO
Is there any difference between a PTO and a VFO? The R-4 has a PTO and the R-4A a VFO per the specs. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PTO/VFO
No. On 18-Feb-11 23:03, Neil M Califano wrote: Is there any difference between a PTO and a VFO? The R-4 has a PTO and the R-4A a VFO per the specs. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail ni...@ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN, EAA382. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R-4A VFO
Is stability the only advantage to the R-4A's semiconductor VFO? Is there any hum, like that from a freq. synthesizer, from solid state VFO? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PTO/VFO
A PTO is a type or style of VFO. Drake uses them interchangebly. There is no synthesizer noise from the R4 series VFO/PFO's. They're solid state for stability. (The FS-4 accessory synthesizer is another story as to noise). 73 Lee WB6SSW ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PTO/VFO
Typically, a PTO refers to a permeability tuned oscillator. In other words, it tunes the inductor with a core that moves in and out of the coil. A VFO typically refers to an oscillator that varies a capacitor to vary the frequency. However, VFO is sometimes used to refer to a traditional VFO, a PTO, and even VCO. -Original Message- From: Nigel Gunn G8IFF/W8IFF ni...@ngunn.net To: Neil M Califano cchange...@yahoo.com Cc: Drakelist@zerobeat.net Sent: Fri, Feb 18, 2011 6:10 pm Subject: Re: [Drakelist] PTO/VFO No. On 18-Feb-11 23:03, Neil M Califano wrote: Is there any difference between a PTO and a VFO? The R-4 has a PTO and the R-4A a VFO per the specs. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail ni...@ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN, EAA382. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PTO/VFO
- Original Message - From: K9sqg k9...@aol.com To: ni...@ngunn.net; cchange...@yahoo.com Cc: Drakelist@zerobeat.net Sent: Friday, February 18, 2011 3:56 PM Subject: Re: [Drakelist] PTO/VFO Typically, a PTO refers to a permeability tuned oscillator. In other words, it tunes the inductor with a core that moves in and out of the coil. A VFO typically refers to an oscillator that varies a capacitor to vary the frequency. However, VFO is sometimes used to refer to a traditional VFO, a PTO, and even VCO. Collins also seems to use both terms although theirs _is_ a PTO. I've also seen other confusing terms used, I think Hallicrafters called theirs a LMO (Linear Master Oscillator) or something of the sort. The advantage of a permeability tuned oscillator is that its fairly easy to get a linear frequency scale by shaping the coil so that the inductance has a square-law relation to linear movment of the core. Its possible to shape the plates of a variable air capacitor to achieve the same thing but the plates become extreme in shape and are hard to make. Such straight-line-frequency capacitors were offered by Cardwell and Hammarlund, maybe also National, in the early 1930's but I think they proved to cause more problems than they solved. There have also been oscillators with simultaneous variation of inductance and capacitance, mostly for VHF/UHF applications. This has the advantage of more linear dial calibration and probably also higher Q. General Radio used this in one or more of its instruments and I think had a patent on it. A problem with the PTO is that its difficult to get the coils to be exactly square-law so some means of correcting them is needed if the dial calibration is to be accurate without individual calibration. Collins used a corrector stack consisting of a series of thin washers clamped by a bolt. The washers could be slid to make a cam surface according to the correction needed. The surface was followed by a roller attached to a lever which could move the position of the nut driving the core just a little. the result was that the exact frequency could be adjusted continuously along the working length of the coil. Other manufacturers made similar arrangements that accomplished the same end without infringing on the Collins patent. I don't think Drake uses any such arrangement. -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drkae TR7 X-lock installation information
It has been brought to my attention that wb4hfn's web site has an installation procedure for the x-lock. It is by Marinos, sv9dru / ki4gin. 73, Ron WD8SBB --- On Sun, 2/13/11, Ron wd8...@yahoo.com wrote: From: Ron wd8...@yahoo.com Subject: [Drakelist] Drkae TR7 X-lock installation information To: drakelist@zerobeat.net Date: Sunday, February 13, 2011, 7:47 AM I am getting a lot of off-list traffic on this subject ask for specific help. I have several folks telling me I should create a web page for this. I have ask Joe KC9LAD if he would mind me doing that because, really it is his RIT interface add on circuit, not mine. Joe is fine with it. I/we will be working this as time permits over the next couple weeks. In the mean time, here is data I have. I hope it helps and also reduces my cut and paste off-list traffic. Also it will be in the archive of this list for future reference. Assembly mods/changes: First thing to do is to take all connection plug headers and carefully bend the solder pins over 90 degrees at the plastic base. Bend them so that the tab of the header will be down when installed. This will allow you to solder the header on the PCB sideways. The pins will only go about half way through the PCB. Since the PCB is plate through holes, this should be okay as long as you solder them from the top and then flip the PCB board over and flow each hole with solder from the bottom. Since there is not a lot of pressure on plug headers they should be fine. Without this mod, the headers and plugs are too tall to fit the board on the bottom of the main board. I followed the assemble instructions and it was a pain to solder the headers at the recommended time. This is because I soldered from the top, which had components in the way. So I believe that I would do the headers first, before any other components. Then follow the instructions for the remainder of the kit. Based on Joe's comments, it would be best to change out the 6 or so large electrolytic capacitors with titanium to reduce the height of the board. I did not do this, but if I get around to it I will rework. The board fits very tight due to height of the electrolytic caps. I used several pieces of electric tape to insulate the bottom cover from the electrolytic caps of the board. Not very professional IMO. You need to add a diode and 3 resistor interface for the RIT circuit. This circuit was given to me by Joe KC9LAD in an e-mail. This circuit allows the RIT and the X-lock control to logic AND their voltage as well as center the RIT voltage at start up. Installation: I took power from the bandpass/power supply board. The one where the little variable resistors are, the ones that if you bump messes up your alignment. With the rig upside down, PTO facing you, it's connector pins are to your far left. There is an electrolytic capacitor (on mine any way) that is from the +12 volt to ground. I forget the pin numbers, but it is in the service manual. Note that this voltage pickup spot may be giving me problems. When I cycle from TX to RX, I get a momentary unlock status on the X-lock LED indicator. Joe suggested that he has seen something like this with voltage spikes that created noise. Still need to research, but everything works fine as it is to date. I picked up the PTO/RF and RIT from the same spots that the other huff-puff folks do. Carel PA0CMU had a very good site at: http://members.ziggo.nl/cmulder/drake.htm Look at the huff puff stabilizer pictures. Second picture down has green circles around the points of interest. PTO/RF in is the lower left circle. RIT in is the lower center circle, and the wire lifted from that RIT line is the RIT out lower right circle. He picked up power from the main board, I think regulated 10 volts circle to the right of the board. You want to see my note on power pickup above as this might be a better location to pick up power. Don't need the top circle because X-lock has it's own reference oscillator. 73, Ron WD8SBB Don't get soaked. Take a quick peek at the forecast with the Yahoo! Search weather shortcut. http://tools.search.yahoo.com/shortcuts/#loc_weather ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Cracked MN2700 Reactive Range Switch Knobs
Are you guys tired of my MN2700 saga yet? I certainly am! Anyway... One of the little cylindrical push-on knobs on the two horizontal reactive range switches broke apart when I grasped it and I think the other one is cracked and not far from breaking. Does anybody have any spares or know of a source? Thanks! Tony K4KYO ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
