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Tom, Friends don't let friends use the Geeksquad! I used to work there long ago. I have been a PC tech since 1983. If you can't find a more local helper, I will be happy to assist over the phone and

Mark, There should be in the group files or photos section a clip of a QST blurb about bypassing the regulators. If it is not there I can probably dig it up. As for grounding, there is a point at the

Dieter, Jim, Thanks for your replies. So, my repaired radio still has two issues. (1) Dieter, you were correct in identifying that the source of the 1 kHz spurs on TX output is the DR7 board.

I have noticed some low level noise in the TR7 audio when I was working on another issue but did not investigate. It was far enough down to not be of much concern. Your spurs are likely from the DR7

Hi Mark, I had a TR7A where noise from the DR7 was audible in the RX. It disappeared when I disconnected the DR7. Additional electrolytics were needed to get rid of this. So if you disconnect the DR7

I think this warrants a new topic, rather than tag it on to my 'repair journey' one. Making a critical assessment of the transmitter performance of my fixed TR-7 prior to using it on-air: When in LSB

Check to see that the set screws on the knob and shaft couplers are tight and not slipping. -- 73 de Mike, W1NR THAT was the equation. EXISTENCE!... SURVIVAL... must cancel out... programming! - Ruk -

Donald, There could be several contributing factors here including but not limited to knob setscrew not tight, worn spot on the vernier drive, hardened lubricant in the vernier drive, drive coupling

Donald Go to?http://www.MSG4u.com?and buy a new veneer drive with the pointer. Works great easy to install. There was a recent article in Qst about this in March I think. Vernier Reduction Drive 6

Recently acquired a L4-B that had not been used in many years. Completed the usual mods in both pieces. When adjusting Plate Control Knob realized variable not always moving. Thinking May be old

Hi Steve Check if C3, C4, C167, crystal socket conductor legs is ok. Try to disconnect C5 (test C5). Schematic: http://www.ve6kq.com/T-4XB%20schematic.pdf backup:

Thanks, everyone! Problem solved… joseph n. graif k4jng

I’d have to second this comment. Unless it’s been in a fire and then run over by a firetruck, the TR7 is quite repairable. There’s lots of used parts floating around, too. Mike, wb8vge

Joseph K4JNG writes: Oh, I get it now. So it didn't go for the other sellers max bid of $3500. Do you recall what it did sell for? I still can't track that sale down in eBay's sales history. (I have

Well, gang, I have another "unique" situation. T-4XB, no transmit, PTO good, band oscillator good, carrier oscillator not working. I tried removing the crystal and testing it and it's good. Voltage

Folks: I have stated several times that the $3,500 "sale" never happened. I fat-fingered a last second bid and then retracted it. I didn't intend to create a "fiasco". Hope this puts it to rest, once

Should work. I was looking to restock my 1N5711s and found a 250pc spool for 25 bucks. I have a lifetime supply now. 73 -Jim NU0C "Bill NZ0T" <nz0tham@...> wrote:

I scored some new Semtech 1N60P Schottky diodes from the USA on Ebay.? Should be here by next week.

Why exactly was it declared "dead"? The TR7 is quite repairable. I would go so far as to say it is one of the most repairable transceivers in it's niche and certainly more repairable than most