Re: [Drakelist] TR-7 Alignment

Great info, Jan! Thanks for posting it, I will add it to my notes. 73 -Jim On Tue, 10 Feb 2009 07:45:26 +0100, Jan Erik Holm wrote: >Did test this on a spare driver board, changed R 2203 >to 270 ohm. >Gain pot midrange and 0.15V from signal generator. > 510 ohm270 ohm >2 MHz

Re: [Drakelist] TR-7 Alignment

Jim Shorney wrote: On Mon, 9 Feb 2009 09:54:49 -0500, K8AC - k8ac wrote: Will have to look at the R2203 change. Standard disclaimers apply. This stuff is a little bit voodoo. What worked for me may not work for you. :) 73 -Jim Did test this on a spare driver board, changed R 2203 to 270 o

Re: [Drakelist] TR-7 Alignment

On Mon, 9 Feb 2009 09:54:49 -0500, K8AC - k8ac wrote: > Will have to look at the R2203 >change. Standard disclaimers apply. This stuff is a little bit voodoo. What worked for me may not work for you. :) 73 -Jim -- Ham Radio NU0C TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A,

Re: [Drakelist] TR-7 Alignment

redriver or ALC settings to fix it. It has behaved okay recently, so I'll just have to keep an eye on it. 73, Dave / K8JDC - Original Message - From: David & Chris Drake To: drakelist@zerobeat.net Sent: Sunday, February 08, 2009 4:12 PM Subject: [Drakelist] TR-7 Alignment

Re: [Drakelist] TR-7 Alignment

28 AM Subject: RE: [Drakelist] TR-7 Alignment Hello David. I had the same problem when I attempted to set 80M output at a much lower level.In the end I went back to 140W on 80M and this gives me 100W at 29.5 with the ALC light extinguishing. John. GI3KDR -Original Message- F

Re: [Drakelist] TR-7 Alignment

-boun...@zerobeat.net]on Behalf Of David & Chris Drake Sent: 08 February 2009 21:13 To: drakelist@zerobeat.net Subject: [Drakelist] TR-7 Alignment Hello, I decided to go back into my TR-7 this afternoon and do some tweeking to my previous alignment. (the S meter seemed to read hi

Re: [Drakelist] TR-7 Alignment

On Sun, 8 Feb 2009 19:23:52 -0500, David & Chris Drake wrote: > >Other issues: I had tweeked the S-meter some, but still reads high. I've >noticed at least 4 S-units higher than my Omni VI+ and about 5 S-units >higher than my TR4C which I think reads a bit low. On Calibrate, CW, on the >null

Re: [Drakelist] TR-7 Alignment

ce between them. (except when using the Omni's DSP) If anyone has any ideas on the high S-meter reading, let me know, but until then, I'll do some more checking. Thanks, David - Original Message - From: "Jim Shorney" To: Sent: Sunday, February 08, 2009 6:

Re: [Drakelist] TR-7 Alignment

On Sun, 8 Feb 2009 17:36:01 -0500, Gary Poland wrote: >If I remember correctly the explaination I got from Drake for lowering the >power to 120 watts was for PA stability on 40 meters, keeping the predriver >below 1/2 turn. I ran into the 40 meter instability problem on two rigs in the 3000 se

Re: [Drakelist] TR-7 Alignment

David, There is a resistor that is switched in on 10 and 15 meters to form a divider with the ALC pot and lower the RF power out required for the ALC to compensate for the lower gain of the PA on those bands ( Thats why 2SC2879's are a popular replacement, more high frequency gain). The predr

[Drakelist] TR-7 Alignment

Hello, I decided to go back into my TR-7 this afternoon and do some tweeking to my previous alignment. (the S meter seemed to read higher than my other radios by quite a bit). After re-setting the S-meter per the manual, I thought I'd go back over the transmitter settings and lower the output s

[Drakelist] TR-7 Alignment

Hi everyone, Just a note to the list. As I have posted previously, I ran into a problem in the alignment of a newly acquired TR-7. Alignment began just fine until I got to the VCO. At that point I could not get the required 15v and 16v on the 14mhz and 28.5mhz bands I was about 1-1.5v short

Re: [drakelist] TR 7 Alignment

"Gary Poland" <[EMAIL PROTECTED]> made an utterence to the drakelist gang -- I suggest using WWV to align the 40 Mhz oscillator, I have had better luck when doing this. Most probes will cause a slight shift in frequency when conne

Re: [drakelist] TR 7 Alignment

Bob W7AVK <[EMAIL PROTECTED]> made an utterence to the drakelist gang -- Mike - Two items before you start an alignment: Make sure the 10 volt regulated is exactly 10.00. Note this adjustment is near a couple others you don't wan

Re: [drakelist] TR 7 Alignment

Mike - I wrote them - just be sure to take it one step at a time, and don't skip any! Mike Mike Williams wrote: Any caveats when aligning a TR 7 using the Drake service manual procedures?   Thanks for any input,   Mike  AK7P

[drakelist] TR 7 Alignment

Any caveats when aligning a TR 7 using the Drake service manual procedures?   Thanks for any input,   Mike  AK7P