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Roberto, does the plate cap to the 3-500Z have a parasitic suppressor? It is beginning to sound like you may have a parasitic oscillation. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies

Found damage on different places. Have cleaned the variable capacitor. Of course, no plates are touching each other and cleanly go inside each other as they should. Nothing is bent. Checked the coil

My first R7 was serial number 138 and it had the one piece rear panel and sticky paint case. It had the antenna switch. 73, Joe Pyles KC9LAD -- This email has been checked for viruses by AVG.

Steve and all. Thanks for your reply. I don't have previous experience with any Drake amp. Two things I believe are not right with this amp: 1) It starts arcing when close or at to 200 Milliamps

Gary: I'll let others with early R-7's answer that question (my remaining one is very late) ....but on a similar note....I do know that the RR-3, rack mounted version of the analog dial R-7, and its

Does anyone know if I should be expecting my early Drake R7 (S/N 358) to be missing the Antenna selection switch? This one has no switch and no residual wiring that would have been associated with it.

I use mine all the time. :) Could be the PO fried the splitter and pulled the assembly out to repair it but never got a round tuit.... 73 -Jim NU0C "VE7PS" <ve7ps@...> wrote:

Gary; A long time ago, in a world far far away, John Kriner, aka "TR7-dude" on the Bay, had some of these switches.? I bought one for my R-4245 clone, which has been installed but never wired up.?

Some chucklehead removed the antenna selector switch from this R7 I just acquired. Is there any chance anybody might have one? It’s a beast of a switch with 5 sections, only two of which would be

Thank you, someone did send me the instructions. Gary W0DVN

Hi Gary, The mobile mounting kit, had a replacement case with a handle. The power cable leads had at the end a enclosure similar to what you describe which indeed could prossibly mointed were the FA7

Gary, I believe you are describing the MMK-7 Kit to make the TR-7 more portable for mobile operation. I may have the instructions somewhere. I'll look if you are have further interest. Jerry, N4JL

Thank you very much. That is very helpful. Gary W0DVN

The case with the handle and the power filter were part of the MMK7 mobile mounting kit. 73, Joe Pyles KC9LAD -- This email has been checked for viruses by AVG. https://www.avg.com

I have a TR7 with a handle on its side and a module on the back holding a power fuse for the 13.8 volts. This is factory original but I have never seen this version before. The side handle is the same

What a great article! I've owned several R-4C's -- two of which had strong third mixer problems and it has been obvious to me that the engineers had been chasing a noise problem in that 6EJ7 circuit.

Lionel: It IS possible that those early 6EJ7 models are prone to this issue.? I just ran out and checked my 22,3xx R-4C and I do see about 2 to 2-1/2 S-units rise on the meter at mid-scale on the

Paul: I don't disagree with you.? Drama is the polite way of putting it. Rob is not the only one who will turn away a radio.? Ron, WB4HFN, will not work on a modified radio, even if those mods are

I would have given more credence to the post if he had not brought in all the drama. For example, it’s Sherwood’s prerogative to accept or reject a request for repair. Of what value was it to the

Peter, the AR forum thread is interesting, and I wonder if I am correct in assuming all 21xxx - 23xxx have the same issue. It seems to be very sensitive to any wiring being moved, like the design is