Re: [AMRadio] Scopes
Almost any old scope will work that doesn't billow smoke when you turn it on. Heath, Eico, Paco, a no name flea market treasure, and all the way to the whiz Tek and HP models. Some RF sampling into the vertical plates and you're in business. Pete, wa2cwa On Wed, 12 Jan 2005 21:17:39 -0700 RICHARD W GILLESPIE [EMAIL PROTECTED] writes: I would like to get a good but not too expensive scope to monitor modulation on my Valiant and Ranger. Any suggestions would be appreciated. Dick/K5DIC
Re: [AMRadio] Scopes
RICHARD W GILLESPIE wrote: I would like to get a good but not too expensive scope to monitor modulation on my Valiant and Ranger. Any suggestions would be appreciated. Like the other guy said, any old scope will work. I have found out, though (and who said sense was common? ;-)) that you can't use a 5Mc scope, to monitor your 40m carrier. That was a -long- time ago, I tried that stunt. Couldn't figure out why things were 'slanted' on 40m, when it looked/worked so sweetly on 75m. 20Mc scopes are fairly common at hamfests. There's times you can find good deals. Other times you will find people that want an arm, a leg and a contract for you to give up your first born child, and share raising rights on the 2nd. Kinda like those people that make a mint off of selling Collins stuff. Just because it says Collins on it, some people seem to start foaming at the mouth. Very similar to Pavlov's Dogs. Personally, I really don't -care- what it is, or do I much care for how it looks, as long as it works. Ok. I need more coffee :-) 73 = Best Regards, -Geoff/W5OMR
Re: [AMRadio] Scopes
I just use a general-purpose oscilloscope. The RF sampler is a length of RG-174 with about 3/4 of the shield removed from one end then stuck through a cabinet hole near the PA in my Valiant. The resulting capacitive probe works fine is cheap to boot. regards, Mahlon - K4OQ -- Message: 3 Date: Thu, 13 Jan 2005 02:22:17 -0500 From: Peter Markavage [EMAIL PROTECTED] Subject: Re: [AMRadio] Scopes To: amradio@mailman.qth.net Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=us-ascii Almost any old scope will work that doesn't billow smoke when you turn it on. Heath, Eico, Paco, a no name flea market treasure, and all the way to the whiz Tek and HP models. Some RF sampling into the vertical plates and you're in business. Pete, wa2cwa On Wed, 12 Jan 2005 21:17:39 -0700 RICHARD W GILLESPIE [EMAIL PROTECTED] writes: I would like to get a good but not too expensive scope to monitor modulation on my Valiant and Ranger. Any suggestions would be appreciated. Dick/K5DIC
[AMRadio] Grounds (was AM Amps)
You know the old saying -- Been there, done that, still have the scars (and with a bit of time may be able to find the paramedic's report.) *Always* make sure AC powered gear has a GOOD earth/safety ground, even RF gear of *any* sort. You don't really want to know what happens when parts of you become part of the counterpoise for a 5 KW medium wave antenna system. And never ever defeat interlocks. Don't ask how I know. (OT-I've even got a couple good scars from my land mobile days from 1 watt UHF HTs) Tom NU4G lockout-tagout poster child Jim, If anyone believes that they don't need a good earth ground on their equipment, I'd be glad to set them straight. Darrell, WA5VGO At 06:07 PM 1/12/2005 -0600, you wrote: Darrell, That amp you built with the 4-1000 was a killer in more ways than one! Time for a confession.. Regards, Jim WD5JKO
Re: [AMRadio] Scopes
Yaesu 100 or 101 Heathkit HO-10 if in good shape. Watch out for those heath hv transformers. They work on the edge of their limits. 73 Robert W4RL RICHARD W GILLESPIE wrote: I would like to get a good but not too expensive scope to monitor modulation on my Valiant and Ranger. Any suggestions would be appreciated. Dick/K5DIC _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] Looking for...
Folks, I am trying to get in touch with Raymond Moore who wrote the books on tubed communciation receivers and tubed transmitters. He used to live in LaBelle FL, but there is no listing for him on Switchboard.com, or his company RSM Communications. Can anyone give me a phone number, a mailing address, an email address?? Many thanks, Bill Fizette w2dgb [EMAIL PROTECTED] --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.832 / Virus Database: 566 - Release Date: 1/10/05
Re: [AMRadio] Scopes
That would be the SB-610 Monitor scope! I have two HO-10s and one SB-610 monitor scope, but I also have and use on the work bench the TEK 502 scope 53XX Dual trace good to 50 Mhz. You definitely need scopes for the audio stuff! Jim WB2FCN Radio - Long may it Wave - Original Message - From: Jim Wilhite [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Thursday, January 13, 2005 10:17 AM Subject: Re: [AMRadio] Scopes Another, sometimes, less costly alternative is the Heath SB 614. Same as the HO 10 but doesn't have the classic standing. Will monitor modulation all the way up to 10 meters. 73 Jim W5JO - Original Message - From: Robert Lawson [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Thursday, January 13, 2005 9:01 AM Subject: Re: [AMRadio] Scopes Yaesu 100 or 101 Heathkit HO-10 if in good shape. Watch out for those heath hv transformers. They work on the edge of their limits. 73 Robert W4RL RICHARD W GILLESPIE wrote: I would like to get a good but not too expensive scope to monitor modulation on my Valiant and Ranger. Any suggestions would be appreciated. Dick/K5DIC _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] AM Amps
Hum, 4-1000A G.G. amplifier, 3000 VDC plate, 700 MA Plate I, 500 MA Grid I, with 125 Watts out of DX-100 running apprx 2100 W input and dissipating 670 watts plate = approximately 1430 watts output! While the carrier level into 50 ohm dummy load is 1400 watts measured and a really NICE orange glow! This is with a 200 cfm blower, air system socket and chimney. Jim WB2FCN - Original Message - From: Jim candela [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Wednesday, January 12, 2005 7:07 PM Subject: RE: [AMRadio] AM Amps Darrell, That amp you built with the 4-1000 was a killer in more ways than one! Time for a confession.. Regards, Jim WD5JKO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Darrell, WA5VGO Sent: Tuesday, January 11, 2005 6:04 PM To: Discussion of AM Radio Subject: Re: [AMRadio] AM Amps At 04:21 PM 1/11/2005 -0500, you wrote: In a message dated 1/11/05 12:14:43 PM, [EMAIL PROTECTED] writes: well all I can say is it works.. works well as a matter of fact, and has been for 6 years :) I typically run between 350 and 400 watts of carrier every day. It looks great on the scope. Modulation envelope is perfect. 100% modulation. In 6 years Ive only lost one tube, and I accidently broke that one. I have to agree with Gary. You're seeing 1600 watts PEP and 400W of carrier OUT with a pair of GG 813s??? Does not compute! Just curious, are you talking about 400W INPUT power to the linear under carrier only condx maybe? If so, this would work out to about 133W carrier OUT and each 813 dissipating about 133W which would make more sense. Dennis D. W7QHO Glendale, CA I'm with Dennis and Gary. To run a linear amplifier at 375 watts of carrier and 100% modulation, you will need around 800 watts of plate dissipation. For a short time a number of years ago, I tried running an AF-68 and a 4-1000A linear amplifier. I could never get more than around 450 watts of carrier and stay linearI didn't need a heater in the shack either. 73, Darrell, WA5VGO 73, Darrell, WA5VGO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.10 - Release Date: 1/10/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 1/12/2005 __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] Looking for...
I got an address for RSM Communications at PO Box 1046, Key Largo, FL 33037. Ask Ray at Electric Radio. He handles the Moore books and has to send the payment somewhere. Pete, wa2cwa On Thu, 13 Jan 2005 10:35:22 -0500 Bill [EMAIL PROTECTED] writes: Folks, I am trying to get in touch with Raymond Moore who wrote the books on tubed communciation receivers and tubed transmitters. He used to live in LaBelle FL, but there is no listing for him on Switchboard.com, or his company RSM Communications. Can anyone give me a phone number, a mailing address, an email address?? Many thanks, Bill Fizette w2dgb [EMAIL PROTECTED]
Re: [AMRadio] AM Amps
good grief!! Now thats an AMP! R -- Original Message --- From: James M. Walker [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Thu, 13 Jan 2005 11:48:34 -0500 Subject: Re: [AMRadio] AM Amps Hum, 4-1000A G.G. amplifier, 3000 VDC plate, 700 MA Plate I, 500 MA Grid I, with 125 Watts out of DX-100 running apprx 2100 W input and dissipating 670 watts plate = approximately 1430 watts output! While the carrier level into 50 ohm dummy load is 1400 watts measured and a really NICE orange glow! This is with a 200 cfm blower, air system socket and chimney. Jim WB2FCN - Original Message - From: Jim candela [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Wednesday, January 12, 2005 7:07 PM Subject: RE: [AMRadio] AM Amps Darrell, That amp you built with the 4-1000 was a killer in more ways than one! Time for a confession.. Regards, Jim WD5JKO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Darrell, WA5VGO Sent: Tuesday, January 11, 2005 6:04 PM To: Discussion of AM Radio Subject: Re: [AMRadio] AM Amps At 04:21 PM 1/11/2005 -0500, you wrote: In a message dated 1/11/05 12:14:43 PM, [EMAIL PROTECTED] writes: well all I can say is it works.. works well as a matter of fact, and has been for 6 years :) I typically run between 350 and 400 watts of carrier every day. It looks great on the scope. Modulation envelope is perfect. 100% modulation. In 6 years Ive only lost one tube, and I accidently broke that one. I have to agree with Gary. You're seeing 1600 watts PEP and 400W of carrier OUT with a pair of GG 813s??? Does not compute! Just curious, are you talking about 400W INPUT power to the linear under carrier only condx maybe? If so, this would work out to about 133W carrier OUT and each 813 dissipating about 133W which would make more sense. Dennis D. W7QHO Glendale, CA I'm with Dennis and Gary. To run a linear amplifier at 375 watts of carrier and 100% modulation, you will need around 800 watts of plate dissipation. For a short time a number of years ago, I tried running an AF-68 and a 4-1000A linear amplifier. I could never get more than around 450 watts of carrier and stay linearI didn't need a heater in the shack either. 73, Darrell, WA5VGO 73, Darrell, WA5VGO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.10 - Release Date: 1/10/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 1/12/2005 __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net --- End of Original Message ---
Re: [AMRadio] Scopes
Hi Dick; Any cheap (Heathkit?) scope will do. Since you make connection directly to the vertical plates of the CRT, the characteristics of the vertical amplifier are moot. Leave the HV DC connections for adjusting centering. The horizontal sweep will run at a low audio frequency, so the sweep oscillator characteristics are not important either. Good luck. 73, Ed Richards K6UUZ On Wed, 12 Jan 2005 21:17:39 -0700 RICHARD W GILLESPIE [EMAIL PROTECTED] writes: I would like to get a good but not too expensive scope to monitor modulation on my Valiant and Ranger. Any suggestions would be appreciated. Dick/K5DIC _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] Scopes
the old Heathkit vector scope has a switch and leads that come directly from the plates, makes an instant scope for monitoring.. Mike - Original Message - From: Peter Markavage [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Thursday, January 13, 2005 2:22 AM Subject: Re: [AMRadio] Scopes Almost any old scope will work that doesn't billow smoke when you turn it on. Heath, Eico, Paco, a no name flea market treasure, and all the way to the whiz Tek and HP models. Some RF sampling into the vertical plates and you're in business. Pete, wa2cwa -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 01/12/2005
[AMRadio] 450TH
Hey, y'all... I *hated* to do it, but finances leave me no choice. Better pictures are at http://www.qsl.net/w5omr/450TH/ http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemcategory=48710item=5743423724rd=1ssPageName=WDVW If that wrapped, then just enter Item #5743423724 --- 73 = Best Regards, -Geoff/W5OMR
[AMRadio] FS: 100TH Eimacs.
I have two, 100TH eimacs. I believe these to be NOS tubes. I dont have the complete boxes but the tubes are still wraped in there protective cover. Not expecting to make a million bucks on these. No reasonable offer refused. Take care, Gary
Re: [AMRadio] AM Amps
Got to be CW, RTTY, etc. With AM you would either melt the tube down or splatter all over the band. 73, Darrell, WA5VGO At 04:49 PM 1/13/2005 -0500, you wrote: How do you reduce the drive for AM? I take it that is how you operate CW? 73 Gary K4FMX James M. Walker wrote: Hum, 4-1000A G.G. amplifier, 3000 VDC plate, 700 MA Plate I, 500 MA Grid I, with 125 Watts out of DX-100 running apprx 2100 W input and dissipating 670 watts plate = approximately 1430 watts output! While the carrier level into 50 ohm dummy load is 1400 watts measured and a really NICE orange glow! This is with a 200 cfm blower, air system socket and chimney. Jim WB2FCN
Re: [AMRadio] AM Amps
To keep the 4-1000 plate from shocking you, ground the plate, and float the chassis. Jim WD5JKO --- Gary Schafer [EMAIL PROTECTED] wrote: How do you reduce the drive for AM? I take it that is how you operate CW? 73 Gary K4FMX James M. Walker wrote: Hum, 4-1000A G.G. amplifier, 3000 VDC plate, 700 MA Plate I, 500 MA Grid I, with 125 Watts out of DX-100 running apprx 2100 W input and dissipating 670 watts plate = approximately 1430 watts output! While the carrier level into 50 ohm dummy load is 1400 watts measured and a really NICE orange glow! This is with a 200 cfm blower, air system socket and chimney. Jim WB2FCN - Original Message - From: Jim candela [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Wednesday, January 12, 2005 7:07 PM Subject: RE: [AMRadio] AM Amps Darrell, That amp you built with the 4-1000 was a killer in more ways than one! Time for a confession.. Regards, Jim WD5JKO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Darrell, WA5VGO Sent: Tuesday, January 11, 2005 6:04 PM To: Discussion of AM Radio Subject: Re: [AMRadio] AM Amps At 04:21 PM 1/11/2005 -0500, you wrote: In a message dated 1/11/05 12:14:43 PM, [EMAIL PROTECTED] writes: well all I can say is it works.. works well as a matter of fact, and has been for 6 years :) I typically run between 350 and 400 watts of carrier every day. It looks great on the scope. Modulation envelope is perfect. 100% modulation. In 6 years Ive only lost one tube, and I accidently broke that one. I have to agree with Gary. You're seeing 1600 watts PEP and 400W of carrier OUT with a pair of GG 813s??? Does not compute! Just curious, are you talking about 400W INPUT power to the linear under carrier only condx maybe? If so, this would work out to about 133W carrier OUT and each 813 dissipating about 133W which would make more sense. Dennis D. W7QHO Glendale, CA I'm with Dennis and Gary. To run a linear amplifier at 375 watts of carrier and 100% modulation, you will need around 800 watts of plate dissipation. For a short time a number of years ago, I tried running an AF-68 and a 4-1000A linear amplifier. I could never get more than around 450 watts of carrier and stay linearI didn't need a heater in the shack either. 73, Darrell, WA5VGO 73, Darrell, WA5VGO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.10 - Release Date: 1/10/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 1/12/2005 __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
Re: [AMRadio] AM Amps
Jim Candela wrote: To keep the 4-1000 plate from shocking you, ground the plate, and float the chassis. Please trim up the messages when you reply, and secondly, some of you old timers have garnered the trusted respect of those who don't have as many gray hairs as y'all do. Put a ;-) or a grin in there, Jim, before someone actually DOES ground the plate, and float the chassis. Next thing you know, we'll be reading about some ham who bit the big one because he leaned his hand on his home brewed rig, to dip the plate, in his bare feet. On cold concrete. Don't ask me how I know. It was that same time I learned about polarized AC plugs. 73 = Best Regards, -Geoff/W5OMR
Re: [AMRadio] AM Amps
Jim Candela wrote: To keep the 4-1000 plate from shocking you, ground the plate, and float the chassis. Have John/WA5BXO tell you about the time I got sent (in a rather unceremoniously manner) from my operating chair, to land upside down on my shoulders, my feet dangling in the air, and a dazed-sounding speech pattern afterwards, one evening while we were in QSO. (remind him that he was in Webster, had just gotten his 250TH final, and had Mike in the shack with him). I think even Fred/WD5BPP was on that night, but I don't remember a lot after that...) 73 = Best Regards, -Geoff/W5OMR
RE: [AMRadio] Grounds (was AM Amps)
There are a lot of careless hams, and a lot of OM hams, but there are very few careless and OM hams.. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Mike Dorworth K4XM Sent: Thursday, January 13, 2005 12:55 PM To: Discussion of AM Radio Subject: Re: [AMRadio] Grounds (was AM Amps) Since we are talking safety and AM radio, as a more than fifty year ham let me tell you that the below stuff is true. Also remember: Turn off the b plus when neutralizing a pair of 813..ask me how I know...DO not jump out the interlocks on a BC610 then turn of the external VFO, then after observing all meter on zero adjust the antenna link.(2500 volt supply under load becomes 4000 VDC!). Happened in 1957, still have hole in finger and wrist bone.. good news, it only took six weeks in the sling.. Things like shorting sticks, wires across oil filled capacitors months after last use are timeless advice that means STAY ALIVE if possible.. 73. Mike K4XM - Original Message - From: Tom Norris [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Thursday, January 13, 2005 9:26 AM Subject: [AMRadio] Grounds (was AM Amps) You know the old saying -- Been there, done that, still have the scars (and with a bit of time may be able to find the paramedic's report.) *Always* make sure AC powered gear has a GOOD earth/safety ground, even RF gear of *any* sort. You don't really want to know what happens when parts of you become part of the counterpoise for a 5 KW medium wave antenna system. And never ever defeat interlocks. Don't ask how I know. (OT-I've even got a couple good scars from my land mobile days from 1 watt UHF HTs) Tom NU4G lockout-tagout poster child Jim, If anyone believes that they don't need a good earth ground on their equipment, I'd be glad to set them straight. Darrell, WA5VGO At 06:07 PM 1/12/2005 -0600, you wrote: Darrell, That amp you built with the 4-1000 was a killer in more ways than one! Time for a confession.. Regards, Jim WD5JKO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 01/12/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 01/12/2005 __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 1/12/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 1/12/2005
Re: [AMRadio] AM Amps
That's a rhetorical question right? Jim WB2FCN Gary Schafer wrote: How do you reduce the drive for AM? I take it that is how you operate CW? 73 Gary K4FMX James M. Walker wrote: Hum, 4-1000A G.G. amplifier, 3000 VDC plate, 700 MA Plate I, 500 MA Grid I, with 125 Watts out of DX-100 running apprx 2100 W input and dissipating 670 watts plate = approximately 1430 watts output! While the carrier level into 50 ohm dummy load is 1400 watts measured and a really NICE orange glow! This is with a 200 cfm blower, air system socket and chimney. Jim WB2FCN - Original Message - From: Jim candela [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Wednesday, January 12, 2005 7:07 PM Subject: RE: [AMRadio] AM Amps Darrell, That amp you built with the 4-1000 was a killer in more ways than one! Time for a confession.. Regards, Jim WD5JKO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Darrell, WA5VGO Sent: Tuesday, January 11, 2005 6:04 PM To: Discussion of AM Radio Subject: Re: [AMRadio] AM Amps At 04:21 PM 1/11/2005 -0500, you wrote: In a message dated 1/11/05 12:14:43 PM, [EMAIL PROTECTED] writes: well all I can say is it works.. works well as a matter of fact, and has been for 6 years :) I typically run between 350 and 400 watts of carrier every day. It looks great on the scope. Modulation envelope is perfect. 100% modulation. In 6 years Ive only lost one tube, and I accidently broke that one. I have to agree with Gary. You're seeing 1600 watts PEP and 400W of carrier OUT with a pair of GG 813s??? Does not compute! Just curious, are you talking about 400W INPUT power to the linear under carrier only condx maybe? If so, this would work out to about 133W carrier OUT and each 813 dissipating about 133W which would make more sense. Dennis D. W7QHO Glendale, CA I'm with Dennis and Gary. To run a linear amplifier at 375 watts of carrier and 100% modulation, you will need around 800 watts of plate dissipation. For a short time a number of years ago, I tried running an AF-68 and a 4-1000A linear amplifier. I could never get more than around 450 watts of carrier and stay linearI didn't need a heater in the shack either. 73, Darrell, WA5VGO 73, Darrell, WA5VGO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.10 - Release Date: 1/10/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.11 - Release Date: 1/12/2005 __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
