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In order to see it, you need to remove the white metal cover that holds the dial lights. I have included a photo of the pTO with the lever brightened in the circle. The lever moves towards the top of

KG Electronics, Wichita, KS owner/head technician: Kurt Graber https://kgelectronics.com Kurt worked for IFR in Wichita on production line and service dept. He has virtually every part for servicing

I have a 1200S and use it just about every day. I have had it for 25 years and it was used when I got it. It's never given me a problem. It may be old, but it's reliable. I would not consider

Gary where is the PTO lever located? And where is the pivot? Mark

Net meets on Sunday, 7238 +/-, at 4-5 PM Eastern Standard Time.

SE-GA.

The ring hold process from the front only adjusts the dial a few KHz or so. The PTO has a lever that you can squeeze to release the PTO tuning mechanism from the 0 to 100 KHz white dial disk. You can

Where are you located?

I have a TR-4C in good working order. I'd rather own a TR-3 in good working order. My TR-4C is in good cosmetic condition (pics attached). I'd like the same in return. Please email me directly. Thanks

Just got a TR-4CW that as far as I can tell works pretty well except that the dial is WAY OFF. I had a station on 7.220 Mhz on the Drake but when I went to go find it on my Yaesu FT-990 (which is spot

I'm looking to add a service monitor to my repair bench. I mostly work on HF, VHF and a few UHF rigs. Although old, I always liked IFR-1200s (with tracking generator), but I presume there are better

There is also an online Files section associated with this group. You will find a plethora of information there, most of it good. Although you should ignore any misguided advice to reverse the

Claudio I'm commenting n the pre-amp matter only. I had a similar problem with a newly acquired R7. The problem was a tiny fracture in one of the copper bits in the circuit board. Check also for dry

Thanks Gary. Will let you know what I find. I might have missed another switch problem. I thought I checked for continuity with all the sections bur maybe not. Thanks for the help.

Correction to V2 analysis: Pin 5 is the AM detector. In AM, the radio uses V2 as the AM detector and as the first audio amplifier, but only in AM. I also added some more paths for the sidetone path.

Analysis of V2: Pin 1 should be 0 if there is no key plugged in or a key is plugged in and the key is keyed. In key up position, this pin should be negative SOMETHING (in RX) because this is the grid

Claudio, I have a box of vintage semiconductors that I've recently inventoried, and in it are several 2N5109 transistors. I've had these parts on a shelf for 20+ years, so I'm confident they're not

I got back to the TR4C today. I disassembled, completely cleaned and inspected the mode switch, found a couple of bent fingers and straightened them and cleaned the switch fully. I did get the AM Mode

I’m at a place called CPC in HAUPPAUGE, NY. Been here for close to 3 years working from the 3T’s to the 9T’s. T stands for Tesla. I’ve been doing RF for over 34 years at different companies

I see you know your way around! I worked on NMR instruments, specifically the Varian XL-100, back in grad school, early 1970’s. This was the first 100 MHz instrument! Of course it did not image