Re: [drakelist] T-4X: No Audio On SSB / AM
EP Swynar [EMAIL PROTECTED] made an utterance to the drakelist gang -- Good Morning Gang, Well, Garey (once again!) earns top honours with his expert long distance trouble-shooting skills...! I poked around the back of switch S1 in my T-4X, saw that the switch lug that anchors R63 C132 looked a tad askew relative to the rest of the lugs...sure enough, with the aid of a small screwdiver, it was quickly made apparent that that the lug had been broken off of the switch, taking a good chunk of phenolic with it. Peering down into the switch shows that another lug is askew as well --- but it doesn't appear to have any phenolic residue attached to it (NOT a good thing). I've epoxied these things successfully in the past with an old Heathkit SB-400 transmitter that I owned, but man-o-man, this particular switch is buried REALLY good within the bowels of the T-4X! Oh well, it will simply HAVE to remedied, no question about that...and if the epoxy ends up a bust, I'm wondering aloud if there might be any source of donor switches around --- or is this another one of those rare earth elements commonly referred to as ...Unobtanium...? Hi Hi. Thanks to all for having taken the time trouble to come to my aid with your individual diagnosis --- it's all much appreciated! ~73~ Eddy VE3CUI - VE3XZ - Original Message - From: Garey Barrell [EMAIL PROTECTED] To: drakelist@zerobeat.net Sent: Saturday, July 05, 2008 10:33 AM Subject: Re: [drakelist] T-4X: No Audio On SSB / AM Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Eddy - OK. Well if it works in TUNE, then ALL the audio stages are working fine. In TUNE, the first mic preamp stage is switched to become a phase shift audio oscillator, and that tone then goes through the transmitter just as if you whistled into the microphone. That same tone is used for the sidetone, and to keep the PTT relay closed in CW. So this leaves a very narrow field for failures, i.e., a couple of switch contacts or the mic jack. So... Either John is correct that your mic is bad, (D-104's are prone to failing from heat and/or humidity,) the wiring to the mic jack is wrong, or there is a problem with the switching between mic amp and TUNE oscillator. You can check the mic with a scope, if you have one, if not, a VTVM or good DMM right at the cartridge terminals should show considerable (a volt or so) AC output when you whistle into the mic. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com EP Swynar wrote: EP Swynar [EMAIL PROTECTED] made an utterance to the drakelist gang -- On 4th July, Garey wrote... ...If you have a KEY plugged in, it must be closed (or unplugged) for SSB... *** Hi Garey, Well, I was HOPING that the solution to my lack of audio on SSB / AM with the T-4X would have been that easy, but alas, there was no joy in Muddville (again) when I tried it here (double sigh!). I measured the resistances on both V9 V10 afterward, all appears to be normal in that regard...next I guess I'll have to measure the actual voltages themeselves. The rig fires up on CW splendidly: it tunes up just as outlined in the manual, has a nice side tone, mutes the R-4, etc. etc. Yet, when I switch to SSB, I CAN trip the internal relay by pressing the PTT button --- but I get only a VERY slight indication of plate current (NO output power) in the mode, and no upward kicks of the meter in any position when tapping the mic...even with the gain cranked way up. With the rig set to AM, the plate current DOES swing hard right momentarily when the PTT is first keyed, but I suspect that has something to do with the controlled carrier set-up in that mode. Back to the ol' proverbial drawing board for me, I guess...! ~73~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net -- -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
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[drakelist] TR7 Transmit Audio
John Stringer [EMAIL PROTECTED] made an utterance to the drakelist gang -- I bought a TR7A on ebay recently and it really is in great condition and works fine except for one BIG problem.I am told that the transmit audio is muddy,distorted,does not seem properly positioned in passband,has a trace of carrier etc. Any ideas about how I should start tackling this problem? John GI3KDR -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] TR7 Transmit Audio
Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang -- On Sun, 6 Jul 2008 14:40:10 +0100, John Stringer wrote: John Stringer [EMAIL PROTECTED] made an utterance to the drakelist gang -- I bought a TR7A on ebay recently and it really is in great condition and works fine except for one BIG problem.I am told that the transmit audio is muddy,distorted,does not seem properly positioned in passband,has a trace of carrier etc. Any ideas about how I should start tackling this problem? John GI3KDR John, Start here: http://www.zerobeat.net/drakelist/passband.html 73 -Jim NU0C -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] TR7 Transmit Audio
Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang -- On Sun, 06 Jul 2008 08:44:41 -0500, Jim Shorney wrote: John, Start here: http://www.zerobeat.net/drakelist/passband.html Or if you like pictures, here: http://www.wb4hfn.com/DRAKE/DrakeArticles/InsideTheTR7/Inside_The_TR7-09.htm -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
RE: [drakelist] TR7 Transmit Audio
John Stringer [EMAIL PROTECTED] made an utterance to the drakelist gang -- Thanks Jim -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Jim Shorney Sent: 06 July 2008 14:45 To: drakelist@zerobeat.net Subject: Re: [drakelist] TR7 Transmit Audio Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang -- On Sun, 6 Jul 2008 14:40:10 +0100, John Stringer wrote: John Stringer [EMAIL PROTECTED] made an utterance to the drakelist gang -- I bought a TR7A on ebay recently and it really is in great condition and works fine except for one BIG problem.I am told that the transmit audio is muddy,distorted,does not seem properly positioned in passband,has a trace of carrier etc. Any ideas about how I should start tackling this problem? John GI3KDR John, Start here: http://www.zerobeat.net/drakelist/passband.html 73 -Jim NU0C -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net -- -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist]
Jim Gerke [EMAIL PROTECTED] made an utterance to the drakelist gang -- Click on the Unsubscribe link that appears at the bottom of any email posted to this list. -- Jim G Rickley wrote: unsubscribe -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist]one word emails
Dan Ringer [EMAIL PROTECTED] made an utterance to the drakelist gang -- No. -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] TR7 Transmit Audio
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- These adjustments affect the RECEIVE filter alignment only. NOT the transmit filter alignment. The Carrier Oscillator frequency is probably off, which is primarily dependent upon the 13.695 MHz VCXO. The only safe answer is a complete realignment, starting with setting the 10V bus adjustment. The alignment is fully described in the Service Manual, and is not difficult, but MUST be done correctly and in the proper order to get it right. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Jim Shorney wrote: Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang -- On Sun, 6 Jul 2008 14:40:10 +0100, John Stringer wrote: John Stringer [EMAIL PROTECTED] made an utterance to the drakelist gang -- I bought a TR7A on ebay recently and it really is in great condition and works fine except for one BIG problem.I am told that the transmit audio is muddy,distorted,does not seem properly positioned in passband,has a trace of carrier etc. Any ideas about how I should start tackling this problem? John GI3KDR John, Start here: http://www.zerobeat.net/drakelist/passband.html 73 -Jim NU0C -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] TR7 Transmit Audio
Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang -- On Sun, 06 Jul 2008 11:25:17 -0400, Garey Barrell wrote: Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- These adjustments affect the RECEIVE filter alignment only. NOT the transmit filter alignment. I beg to differ, Gary. They DO affect transmit. Been there, done that. 73 -Jim NU0C -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
[drakelist] T-4X: No Audio On SSB / AM --- Almost There!
EP Swynar [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hi Guys, Well, rather than trying my luck for a new S1 switch for the T-4X here (fat chance, no doubt!), I reverted back to ...making-do with what I've got, i.e.: -I made a sketch of the wafer, indicated which coloured wire(s) was soldered to what lug(s); -Then I snipped off each of the attaching wires right at each lug; -I confirmed where, exactly, the one loose orphan lug was supposed to attach to the wafer, and how everything was to align, and finally, -I applied just a wee bit of slow-cure epoxy glue to the phenolic piece that broke off, and secured everything nice steady for the 24 hour curing process with a piece of masking tape. Once the intial application of glue has hardened, I'll apply LIBERAL amounts of additional glue, on BOTH sides of the switch as well as to the edges, to ensure things won't come apart again under stress of rotation. As I said before, this technique worked very well with the function switch on my old SB-400, right up to the day I retired the rig. ...And hopefully this'll be the last of this string! ~73~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] T-4X: No Audio On SSB / AM --- Almost There!
Don Cunningham [EMAIL PROTECTED] made an utterance to the drakelist gang -- No, Ed, the last message needs to tell us how it worked after cure!! That's how we all learn, hi. I'm enjoying watching the posts, as this one has been a STRANGE one, hi. 73, Don, WB5HAK - Original Message - From: EP Swynar [EMAIL PROTECTED] To: drakelist@zerobeat.net Sent: Sunday, July 06, 2008 12:21 PM Subject: [drakelist] T-4X: No Audio On SSB / AM --- Almost There! EP Swynar [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hi Guys, Well, rather than trying my luck for a new S1 switch for the T-4X here (fat chance, no doubt!), I reverted back to ...making-do with what I've got, i.e.: -I made a sketch of the wafer, indicated which coloured wire(s) was soldered to what lug(s); -Then I snipped off each of the attaching wires right at each lug; -I confirmed where, exactly, the one loose orphan lug was supposed to attach to the wafer, and how everything was to align, and finally, -I applied just a wee bit of slow-cure epoxy glue to the phenolic piece that broke off, and secured everything nice steady for the 24 hour curing process with a piece of masking tape. Once the intial application of glue has hardened, I'll apply LIBERAL amounts of additional glue, on BOTH sides of the switch as well as to the edges, to ensure things won't come apart again under stress of rotation. As I said before, this technique worked very well with the function switch on my old SB-400, right up to the day I retired the rig. ...And hopefully this'll be the last of this string! ~73~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net -- No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.4.5/1537 - Release Date: 7/6/2008 5:26 AM No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.4.5/1537 - Release Date: 7/6/2008 5:26 AM -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] T-4X: No Audio On SSB / AM --- Almost There!
john [EMAIL PROTECTED] made an utterance to the drakelist gang -- Good going Eddy! I'm really anxious to see how it works for you! John K5MO At 01:21 PM 7/6/2008, you wrote: EP Swynar [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hi Guys, Well, rather than trying my luck for a new S1 switch for the T-4X here (fat chance, no doubt!), I reverted back to ...making-do with what I've got, i.e.: -I made a sketch of the wafer, indicated which coloured wire(s) was soldered to what lug(s); -Then I snipped off each of the attaching wires right at each lug; -I confirmed where, exactly, the one loose orphan lug was supposed to attach to the wafer, and how everything was to align, and finally, -I applied just a wee bit of slow-cure epoxy glue to the phenolic piece that broke off, and secured everything nice steady for the 24 hour curing process with a piece of masking tape. Once the intial application of glue has hardened, I'll apply LIBERAL amounts of additional glue, on BOTH sides of the switch as well as to the edges, to ensure things won't come apart again under stress of rotation. As I said before, this technique worked very well with the function switch on my old SB-400, right up to the day I retired the rig. ...And hopefully this'll be the last of this string! ~73~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net -- -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist]
Why not follow the link to unsubscribe - Original Message - From: Jack Schrader To: drakelist@zerobeat.net Sent: Sunday, July 06, 2008 2:09 PM Subject: [drakelist] unsubscribe drakelist
Re: [drakelist] RE: T4X-B, R4-B, L4B For SAle
john [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hi Jim What kind of power out do you see with the 4-400's? Thank you John K5MO At 01:08 PM 7/4/2008, you wrote: I recently bought out an inactive ham who had an all Drake station, R4-B, T4X-B, and an L4B. I don't want the gear, but wanted to pass the tower and beam along to a young ham just getting into HF. The local DX club helped me take the tower down. I have checked the gear out and had it on the air on CW and SSB. It all works well and looks pretty good, with some scratches and signs of wear on the transmitter and receiver cabinets. The linear has 4-400's in place of the original 3-500's . The screen grids have been jumpered to ground at the tube sockets. It operates normally except for the increase in grid current. The L4-B is very clean. Both of the power supplies look good and work well, no dents or other damage. I'd like to not have to ship this gear and can work out a delivery within a reasonable distance.of Smithfield, Virginia. I am asking $500 for the linear and $400 for the twins. The power supplies are included. Jim Wise, W4PRO -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] T-4X: No Audio On SSB / AM --- Almost There!
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang -- Eddy - That switch is such a bear to replace, I'm not so sure your repair isn't better! Let us know how you make out. I suspect a switch could be found if your repair doesn't work. 73, Garey - K4OAH Glen Allen, VA EP Swynar wrote: EP Swynar [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hi Guys, Well, rather than trying my luck for a new S1 switch for the T-4X here (fat chance, no doubt!), I reverted back to ...making-do with what I've got, i.e.: -I made a sketch of the wafer, indicated which coloured wire(s) was soldered to what lug(s); -Then I snipped off each of the attaching wires right at each lug; -I confirmed where, exactly, the one loose orphan lug was supposed to attach to the wafer, and how everything was to align, and finally, -I applied just a wee bit of slow-cure epoxy glue to the phenolic piece that broke off, and secured everything nice steady for the 24 hour curing process with a piece of masking tape. Once the intial application of glue has hardened, I'll apply LIBERAL amounts of additional glue, on BOTH sides of the switch as well as to the edges, to ensure things won't come apart again under stress of rotation. As I said before, this technique worked very well with the function switch on my old SB-400, right up to the day I retired the rig. ...And hopefully this'll be the last of this string! ~73~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
RE: [drakelist] Question
Carl: He drives a Toyota (an FJ 40, I hope.) because he knows how superior they are to Jeeps. (Did you know that in Mexico, they pronounce them Heeps?) The grille is probably merely an oversight. Terry K7WLD From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, July 04, 2008 11:15 AM To: drakelist@zerobeat.net Subject: Re: [drakelist] Question [EMAIL PROTECTED] writes: Mike, WB8VGE Um Hmmm, a Jeep grille on his emails and yet he drives a Toyotatch tch. Hi Mike, Carl Hibbard _ Gas prices getting you down? Search AOL Autos for fuel-efficient used cars http://autos.aol.com/used?ncid=aolaut000507 .
Re: [drakelist] T-4X: No Audio On SSB / AM --- Almost There!
EP Swynar [EMAIL PROTECTED] made an utterance to the drakelist gang -- On 6th July, Garey wrote... ...That switch is such a bear to replace, I'm not so sure your repair isn't better! * Hi Garey, Many thanks for the FB note...and my thanks to Don John for their words of support, too! Yes, replacing that entire switch would be a real nightmare --- reminds me of servicing modern-day cars, wherein half of the A/C plumbing has to be removed first, in order to get access to a sparkplug...! Hi Hi Well, all I did here was REMOVE just the (affected) back wafer, applying the proverbial K.I.S.S. philosophy...and I'm glad I did, because I know that a repair would have been absolutely impossible without literally having the wafer ...in hand. There is simply no way that I could have seen where the orphan lug / contact belonged, never mind installing it properly. I guess I was lucky that it was only the rear wafer that was bad, NOT the front one! Anyway, I'll let the first application of epoxy harden overnight --- to-morrow I'll apply more to impart strength into it, and may well do so again after that, too...and then let it all sit undisturbed for about 48 hours, to insure everything is solid well, before re-installing it into the T-4X. I'll have an update as to my success (or LACK thereof!) probably near the end of the week...stay tuned, if interested, Hi Hi... ~73!~ Eddy VE3CUI - VE3XZ -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] RE: T4X-B, R4-B, L4B For SAle
w4pro [EMAIL PROTECTED] made an utterance to the drakelist gang -- I got 800 watts out. Jim - Original Message - From: john [EMAIL PROTECTED] To: drakelist@zerobeat.net Sent: Sunday, July 06, 2008 14:10 Subject: Re: [drakelist] RE: T4X-B, R4-B, L4B For SAle john [EMAIL PROTECTED] made an utterance to the drakelist gang -- Hi Jim What kind of power out do you see with the 4-400's? Thank you John K5MO At 01:08 PM 7/4/2008, you wrote: I recently bought out an inactive ham who had an all Drake station, R4-B, T4X-B, and an L4B. I don't want the gear, but wanted to pass the tower and beam along to a young ham just getting into HF. The local DX club helped me take the tower down. I have checked the gear out and had it on the air on CW and SSB. It all works well and looks pretty good, with some scratches and signs of wear on the transmitter and receiver cabinets. The linear has 4-400's in place of the original 3-500's . The screen grids have been jumpered to ground at the tube sockets. It operates normally except for the increase in grid current. The L4-B is very clean. Both of the power supplies look good and work well, no dents or other damage. I'd like to not have to ship this gear and can work out a delivery within a reasonable distance.of Smithfield, Virginia. I am asking $500 for the linear and $400 for the twins. The power supplies are included. Jim Wise, W4PRO -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net -- -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
[drakelist] finished AC3 upgrade
Just finished my second AC3 upgrade with the wonderful kit from http://www.theheathkitshop.com/drakeac4r.html This one was significantly easier than the first one I did. The first AC3 I did had some ambiguous wire colors, so there was some confusion. This AC3 seemed more aligned to the AC4 upgrade instructions. I did note that in the instructions there was mentioned a white / orange wire, and in this AC3 it was simply orange. My only other two cents worth are: 1) As I ended up doing with the first one, I have a filament transformer hookup that gives me about a 15:1 reduction from line voltage, makes that initial snap crackle pop voltage test a little less stressful 2) Even if 1) tests out OK, that doesn't mean at full voltage you might not encounter some arcing at full voltage if something was in too close proximity to something else. On the first conversion I did, I had an alligator clip from the DVM to the HV, and the clip placement was enough to get some exciting arcing. Also, take care to make sure nothing's sticking out that might meet the bottom plate. Again, a most satisfying project, thanks Mike ! Chuck, K1OM, Alachua, FL
[drakelist] Metal Varnish Question
Hi Drakelist The alloy chassis used in the Drake C Line series appear to have been dipped or sprayed with a light yellow-gold protective varnish or lacquer possibly to protect against corrosion. This is what gives the chassis a light golden appearance. Does anyone know of a distributor who supplies a similar type of metal varnish or lacquer? Wade VA3HM
[drakelist] unsubscribe
Astrom, Kenth B. [EMAIL PROTECTED] made an utterance to the drakelist gang -- unsubscribe -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
[drakelist] Taming the shrew
Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang -- Well, another problem cropped up today. Earlier this evening I was helping a local ham air check a new antenna on HF. Ironically, he seemed to be suffering from RF feedback on 75 meters, so we went to 40. As soon as I keyed the mic and started talking, the TR7 took off with close to 100 watts of SOMETHING that looked like a carrier. Subsequent tests on 20 and 10 revealed that his antenna and my radio were both working fine on those bands ( he said my audio was EXCELLENT). Good thing the radio was still sitting in the lab, or I would have really been annoyed. Testing into the dummy load revealed that under full power operating conditions, the TR7 was oscillating at about 9.6 MHz, in ONLY the 7.0-10.0 MHz bandswitch position. All other bands were rock solid, anywhere I checked. I looked at all the obvious things, HP filter, LP filter, grounding, PIN diodes, etc.; everything seemed to be in order. (BTW, an MFJ-259 antenna analyzer will drive the TR7 to 200+ watts output when injected through the HP filter board). The good news is that the new PA transistors survived this abuse with flying colors, and the heatsink was never more than warm to the touch. I finally backed the predriver gain pot down a little, and that seemed to kill the oscillation. I didn't go back and reset power levels, because it was getting late and I wanted to knock off and ponder this a little bit more. Any thoughts from the gurus on how to tame this beast? Even with power reduced, it makes me a little nervous that the transmitter stip could be that close to the edge on 40 meters. 73 -Jim NU0C -- Submissions:drakelist@zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net --
Re: [drakelist] T-4X: No Audio On SSB / AM --- Almost There!
Eddy, Be real sure the contacts line up correctly so when you turn the switch the contact SMOOTHLY go into position, not hitting the sidea at all (well centered) 73, Lee ** Gas prices getting you down? Search AOL Autos for fuel-efficient used cars. (http://autos.aol.com/used?ncid=aolaut000507)
