[Drakelist] Christmas 2008
Best Wishes to All for Christmas at the end of this amazing year. Thank you too to all on the Drake List who helped me so often . You are the best thing ever happened to me on the Internet! John. GI3KDR attachment: winmail.dat___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake 2-B S-Meter Calibration/AVC
Hello. Merry Xmas to all of you. Still need some help on my 2-B that still on the bench. I have calibrated the S-Meter using the manual instructions. The radio was turned on for a long time BTW. The process was straightforward. Too bad that even a 15Mohm voltmeter shunts the AVC line. The manuals procedure takes this in account. Later I realized that when I turned the radio on again, the S-meter did not go to S1 right away. This is what happens: When I turn on the 2-B, the S-meter goes to around S9+10 and then goes down to S8. Then it starts a process that takes around 10 minutes until it goes to S1 (to the calibrated position). I have verified the whole AVC circuit (resistors and capacitors). The AVC is working apparently well. It acts, as it should. I have also replaced the 6BF6 (AVC amplifier). Nothing changes this behavior. I also realized that there is a slight change on the S meter S1 when the AVC is set from fast to slow (or vice versa). On Slow the S meter goes closer to S2. When the resting process is happening, I tried to monitor the AVC2 voltage with the VTVM or with an oscilloscope, but the measurement instruments load difficult the task and even changes the S-meter position. I do not think it has to do with heat because sometimes I turn the receiver off for few minutes and turn it on and all happens once again. I am wondering if someone have experimented that and/or has any tip. Thanks and regards Fred ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] merry christmas
Drakelist members, I don't post much but read and profit from everything. The talent on this list and civility with which things are done are truly a blessing. Merry Christmas to all and thank you. Rick Tucker W0RT Drake C-line R4B/T4XC R4A/DX-60B/HG-10B (40 cw)___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] REALLY DIFFERENT TR3
Thanks to some very nice guys on this list, who have been helpful to me, I have determined that I have a WEIRD Drake TR 3. My TR 3 is Serial # 6564 and since there were various versions, I now know that the two boards between tube sockets V 18 and V 19 and the audio transformer are wired differently than those two TR3s below #10,000 owned by my friends Doyle and Larry. When I hook up the 3.3K resistor to the terminals used in their TR 3s I get hot resistors and SMOKE When I put the 3.3k resistor between the top left terminal on the forward of the two boards and the top right terminal of the next board back from the front the receiver works albeit it is NOT very hot and the crystal calibrator reads only about S5 on the S meter. NO SMOKE when resistor is mounted between the two boards in that manner. Does anyone have a TR 3 which has the 3.3k resistor mounted between the two boards at the top terminals of each??? MY schematic diagram is almost unreadable and the part designations and values are almost unreadable. In addition, my manual and schematic did not come with the TR 3 I have. I love Drakes, but sometimes I think each was wired as if it was a prototype wired and assembled by retarded CHIMPS. Anyone have any suggestions for trouble shooting this WEIRD conglomeration without the specific schematic and manual for this run of TR3s. Speaking of runs this thing gives me the runs!! Merry Christmas and Happy New Year to ALL!!! 73, John, K5PGW ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] REALLY DIFFERENT TR3
This is for reference: I am working on restoring a stripped TR-4C. One thing wrong with it is the filter cap needs replacing (the 4 section can electrolytic in my case. I think earlier ones had a 3 section can electrolytic). My can electrolytic is definately bad. That resistor you are talking about in my radio is cracked and broken in two and it is a 47 ohm resistor. It is called R-163 in a TR-4C. I think it got ruined when the can electrolytic went bad. Maybe your resistor is getting hot due to a bad can electrolytic. When I got my radio the relay was also missing and the 27 ohm resistor in series with the relay coil was also burned up and broken in two. (My radio uses a different relay then yours). I don't know if this also happened when the can capacitor went bad. Now here is some info for maybe your radio. Looking at an earlier TR-4 manual, not a TR-3 manual, I see the resistor is marked R-111 and is a 3.3k resistor. I'm talking about the resistor you are having trouble with going between the two boards. Again, maybe your electrolytic is bad and causing your replacement 3.3k resistor to get hot. I bought the CD service information disc for the TR-4 and TR-4C radios from K4OAH. It saves me a lot of time finding the parts on the radio. The schematics and color shots of all the sections of the radio are of very high resolution. Also, I purchased a fresh replacement can electrolytic from Hayseed Hamfest Co. www.hayseedhamfest.comIt is drop in, fresh, newly made, great construction and the voltage ratings of each section are slightly better then those of the original cap. Hope this helps. Lee, w0vt Houston, TX My radio came - Original Message - From: John King k5...@yahoo.com To: drakelist@zerobeat.net Sent: Thursday, December 25, 2008 10:30 AM Subject: [Drakelist] REALLY DIFFERENT TR3 Thanks to some very nice guys on this list, who have been helpful to me, I have determined that I have a WEIRD Drake TR 3. My TR 3 is Serial # 6564 and since there were various versions, I now know that the two boards between tube sockets V 18 and V 19 and the audio transformer are wired differently than those two TR3s below #10,000 owned by my friends Doyle and Larry. When I hook up the 3.3K resistor to the terminals used in their TR 3s I get hot resistors and SMOKE When I put the 3.3k resistor between the top left terminal on the forward of the two boards and the top right terminal of the next board back from the front the receiver works albeit it is NOT very hot and the crystal calibrator reads only about S5 on the S meter. NO SMOKE when resistor is mounted between the two boards in that manner. Does anyone have a TR 3 which has the 3.3k resistor mounted between the two boards at the top terminals of each??? MY schematic diagram is almost unreadable and the part designations and values are almost unreadable. In addition, my manual and schematic did not come with the TR 3 I have. I love Drakes, but sometimes I think each was wired as if it was a prototype wired and assembled by retarded CHIMPS. Anyone have any suggestions for trouble shooting this WEIRD conglomeration without the specific schematic and manual for this run of TR3s. Speaking of runs this thing gives me the runs!! Merry Christmas and Happy New Year to ALL!!! 73, John, K5PGW ___ 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] plug in relay for TR3
My TR 3 has been converted to the plug in type relay. Can anyone tell me the manufacturer of the relay, its' part number, where I can get it and the price? Thanks and 73, John, K5PGW ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] plug in relay for TR3
The relay used in some Drakes rigs including some TR-4s and the TR-4C is Mouser Part Nbr 655-R10-E1Y4-V2.5KIt is a Potter Brumfield R10-E1Y4-V2.5K I bought one a few days ago and it cost $16.68. This is a 2.5K relay. Some Drakes used a 15K relay but they can be interchanged if a resistor is changed. I don't know what conversion relay you have in there. Most likely it is a 15K unit. Lee, w0vt - Original Message - From: John King k5...@yahoo.com To: drakelist@zerobeat.net Sent: Thursday, December 25, 2008 2:16 PM Subject: [Drakelist] plug in relay for TR3 My TR 3 has been converted to the plug in type relay. Can anyone tell me the manufacturer of the relay, its' part number, where I can get it and the price? Thanks and 73, John, K5PGW ___ 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] Drake 2-B S-Meter Calibration/AVC
Dennis, merry xmas to you and yours, firts of all. Thanks for the input. I don not know if I my explanation was clear enough. The long S-meter journey to S1 just occurs after power the unit up and for 10 or so minutes. After that the behaivor is normal. Yes my first shot was a opened path to discharge the AVC circuitry. Unfortunately I have not found anything to blame. Did you consider that after the initial pb the behaivor seems to be normal ? Regards Fred ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake 2-B S-Meter Calibration/AVC
Thanks Dennis. I will check that. On Thu, 25 Dec 2008 22:18:34 -0200, Dennis Monticelli dennis.montice...@gmail.com wrote: Well, there still may be a thermal effect. It is hard to imagine a time constant of several minutes that is due to a capacitor, while a component or sub-assembly will undergo such time constants. If you have some cold spray, you might try a short blast in specific areas to see if there is a dramatic change. As for what may be the root cause, I would check for evidence of a carrier bleed-through or spurious signal or a possible weak oscillation that is getting through the IF chain and getting rectified by the AVC detector (in other words, masquerading as a real signal). Dennis On Thu, Dec 25, 2008 at 3:01 PM, py...@integral.com.br wrote: Dennis, merry xmas to you and yours, firts of all. Thanks for the input. I don not know if I my explanation was clear enough. The long S-meter journey to S1 just occurs after power the unit up and for 10 or so minutes. After that the behaivor is normal. Yes my first shot was a opened path to discharge the AVC circuitry. Unfortunately I have not found anything to blame. Did you consider that after the initial pb the behaivor seems to be normal ? Regards Fred ___ 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] t4x case type
hi gang and merry christmas does the t-4x have the splatter paint job or a smooth paint on the case? Carey Lockhart, KC5GTT kc5...@gmail.com www.kc5gtt.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] t4x case type
Chuck, thats strange. i wonder why they did that? the r-4a i have is textured. is yours? Carey Lockhart, KC5GTT kc5...@gmail.com www.kc5gtt.com On Dec 25, 2008, at 7:03 PM, Chuck Grandgent wrote: seems pretty smooth on the two that I have. Chuck, K1OM On Thu, Dec 25, 2008 at 7:57 PM, Carey Lockhart kc5...@gmail.com wrote: hi gang and merry christmas does the t-4x have the splatter paint job or a smooth paint on the case? Carey Lockhart, KC5GTT kc5...@gmail.com www.kc5gtt.com ___ 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] t4x case type
Smooth. The Polane paint jobs came later, I think it started with the C line. Lee, w0vt - Original Message - From: Carey Lockhart To: drakelist@zerobeat.net Sent: Thursday, December 25, 2008 6:57 PM Subject: [Drakelist] t4x case type hi gang and merry christmas does the t-4x have the splatter paint job or a smooth paint on the case? Carey Lockhart, KC5GTT kc5...@gmail.com www.kc5gtt.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] t4x case type
My R-4A, T-4X and MS-4 are not textured. I bought them new and still have them. BTW, for my $, the R-4A is the best sounding receiver of the entire line. Merry Christmas and 73, John, W4AWM ** Don't be the last to know - click here for the latest news that will have people talking. (http://www.aol.com/?ncid=emlcntaolcom0021) ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] t4x case type
well i think i will go with the smooth since thats what it is. i can always repaint later. my b line has textured paint but my older tr-4 does not. thanks for the help guys Carey Lockhart, KC5GTT kc5...@gmail.com www.kc5gtt.com___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] t4x case type
My early R4B is textured. On Thu, Dec 25, 2008 at 5:46 PM, Carey Lockhart kc5...@gmail.com wrote: well i think i will go with the smooth since thats what it is. i can always repaint later. my b line has textured paint but my older tr-4 does not. thanks for the help guys Carey Lockhart, KC5GTT kc5...@gmail.com www.kc5gtt.com ___ 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] Drake 2-B S-Meter Calibration/AVC
I have yet another wild idea. I don't have a schematic in front of me so I don't know if there is a buffer between the high Z node and the AVC line that feeds the grids. If there is no buffer, then perhaps one of the gain controlled tubes has a grid emission problem that is charging up the AVC line and overcoming the discharge resistor. Dennis AE6C On Thu, Dec 25, 2008 at 4:45 PM, py...@integral.com.br wrote: Thanks Dennis. I will check that. On Thu, 25 Dec 2008 22:18:34 -0200, Dennis Monticelli dennis.montice...@gmail.com wrote: Well, there still may be a thermal effect. It is hard to imagine a time constant of several minutes that is due to a capacitor, while a component or sub-assembly will undergo such time constants. If you have some cold spray, you might try a short blast in specific areas to see if there is a dramatic change. As for what may be the root cause, I would check for evidence of a carrier bleed-through or spurious signal or a possible weak oscillation that is getting through the IF chain and getting rectified by the AVC detector (in other words, masquerading as a real signal). Dennis On Thu, Dec 25, 2008 at 3:01 PM, py...@integral.com.br wrote: Dennis, merry xmas to you and yours, firts of all. Thanks for the input. I don not know if I my explanation was clear enough. The long S-meter journey to S1 just occurs after power the unit up and for 10 or so minutes. After that the behaivor is normal. Yes my first shot was a opened path to discharge the AVC circuitry. Unfortunately I have not found anything to blame. Did you consider that after the initial pb the behaivor seems to be normal ? Regards Fred ___ 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 mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] REALLY DIFFERENT TR3
John - I got home a little earlier than I expected Your TR-3 is not weird, just early. That resistor is indeed R111, and is 3.3k / 1/2W. It is between the +250V bus and the +245V bus. The +245V bus is a decoupled supply for V16 and V18, the low level Audio stages. About the only thing that would overload that resistor, aside from a temporary or permanent short to ground, is a leaky or shorted C145B, which is the 60 uF section in the original can cap. Quite a few of the differences in the 14 versions of TR-3 - TR-4CwRIT are in the area of the power supply decoupling by C145, and the S-Meter circuit. I am forwarding a copy of the 3001 s/n schematic for the TR-3, which is the only version I have found aside from the 1 s/n schematic. Your sensitivity problem is almost certainly NOT related to this resistor, but rather to an AGC problem. One thing to watch out for is that the S-Meter in the TR-3 is a higher basic movement than the meter used in the TR-4. Also, the AGC, when working properly, makes it very difficult to determine just how strong a signal is without a KNOWN signal input level. I like the Elecraft XG-1/2 oscillators or the S-9 from Norcal. Hard to beat for a quick receiver check, and a heck of a lot easier to set up and get running than my HP 606A!! 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com John King wrote: Thanks to some very nice guys on this list, who have been helpful to me, I have determined that I have a WEIRD Drake TR 3. My TR 3 is Serial # 6564 and since there were various versions, I now know that the two boards between tube sockets V 18 and V 19 and the audio transformer are wired differently than those two TR3s below #10,000 owned by my friends Doyle and Larry. When I hook up the 3.3K resistor to the terminals used in their TR 3s I get hot resistors and SMOKE When I put the 3.3k resistor between the top left terminal on the forward of the two boards and the top right terminal of the next board back from the front the receiver works albeit it is NOT very hot and the crystal calibrator reads only about S5 on the S meter. NO SMOKE when resistor is mounted between the two boards in that manner. Does anyone have a TR 3 which has the 3.3k resistor mounted between the two boards at the top terminals of each??? MY schematic diagram is almost unreadable and the part designations and values are almost unreadable. In addition, my manual and schematic did not come with the TR 3 I have. I love Drakes, but sometimes I think each was wired as if it was a prototype wired and assembled by retarded CHIMPS. Anyone have any suggestions for trouble shooting this WEIRD conglomeration without the specific schematic and manual for this run of TR3s. Speaking of runs this thing gives me the runs!! Merry Christmas and Happy New Year to ALL!!! 73, John, K5PGW ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake 2-B S-Meter Calibration/AVC
Fred - I have been traveling and missed some of this thread. Try subbing tubes in the AVC stages. Often an IF tube will be gassy, and the grid will lose control after 5-20 minutes of warmup. The 12BA6 is particularly susceptible to this problem, even in New Old Stock tubes. You sometimes have to try three or four before finding a good one. The AVC circuit is so hi-z that it takes very little grid current to upset it. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com py...@integral.com.br wrote: Dennis, merry xmas to you and yours, firts of all. Thanks for the input. I don not know if I my explanation was clear enough. The long S-meter journey to S1 just occurs after power the unit up and for 10 or so minutes. After that the behaivor is normal. Yes my first shot was a opened path to discharge the AVC circuitry. Unfortunately I have not found anything to blame. Did you consider that after the initial pb the behaivor seems to be normal ? Regards Fred ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] t4x case type
Carey - In my experience, Drake started using a spatter finish on the version 3 of the R-4A, which was well into the T-4X production. Early T-4X were indeed smooth satin black finish, as were the R-4 and R-4A version 1 and 2. The spatter finish went through the R-4B and then the textured finish started with the C-Line. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Carey Lockhart wrote: hi gang and merry christmas does the t-4x have the splatter paint job or a smooth paint on the case? Carey Lockhart, KC5GTT kc5...@gmail.com mailto:kc5...@gmail.com www.kc5gtt.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] plug in relay for TR3
John - Drake sold a conversion kit for the TR series and the pre-C Line T-4X transmitters. The early C-Line used a British made (Valpey) plug-in relay that had a 15k coil impedance, and the wire was so fine that is was either breaking from corrosion at the solder tabs or mechanical stress caused by the heat variations. They changed to a 2.5k relay, which was a drop-in replacement except for a 1.5k / 1W resistor in series with the coil. The added resistor is sometimes installed across the socket for the 6EV7, between a blank pin and the plate. I have the relay p/n, but not at hand. Someone else has probably already sent it to you anyway. It's a current PB (TYCO) relay available from Mouser and others for about $16. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com John King wrote: My TR 3 has been converted to the plug in type relay. Can anyone tell me the manufacturer of the relay, its' part number, where I can get it and the price? Thanks and 73, John, K5PGW ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
