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The TR3's 100Khz calibrator signal can be checked at pin 1 of V7. If your scope can display the frequency of the signal, connect the scope probe (probe initially set to x10) to pin 1 of V7. Turn the

I agree with Gary.? A nice 2-B and a nice R-4B can both be bought for around $200.? I own both.? While the 2-B is a very good receiver and I like it a lot, the R-4B is even better and I like it

I had a constant tone when I engaged the Calibrator in my TR-4. It can be caused by the carrier oscillator not being set properly. Barry - N4BUQ

The RV3 socket pins that need to be connected when the RV3 is not plugged into the "J2" on the bottom of the TR3, are pins 2 and 8. Look at the TR3 schematic, J2 clearly shows the dotted lines between

Dave,There's a jumper on the remote VFO connector on the bottom of the radio that is cut to enable the radio to work with the remote VFO.? Make sure that jumper is still there.? It should be under

Dave, is the RV3 jumper plug with pins 2 and 8 shorted, plugged into the bottom of the TR3's RV3 socket? Some TR3s have a solid wire soldered to pins 2 and 8 with the wire routed across the female

I find myself with another TR-3 that I was not expecting. I arrived at my Hamvention booth Saturday morning to find a TR-3 sitting there. A fellow booth person who is local to Dayton brought it to me

Evan, Yes, great weather all weekend. I arrived Wednesday night and was at Nick's for dinner Thursday night. The wind was a little bit to take but we all survived. I followed this up by a spending

I have been reading about them for electric vehicles (boost and regen braking etc.) so I thought of using them to take the switch-on surge and divert the surge from the filaments. You would need a

Using a Drake 2B receiver with a T4/T4X<any> transmitter, the front panel PASS BAND setting must be in the correct setting otherwise you won't be on the same Side Band as the station or ground you are

I used a 2-B with a T-4X in the 60s. Worked fine. Didn't transceive, but back then spotting the transmitter in the receiver was common. 73 Paul, N9PL

Opps.? Thank you, Gary.? I guess I need to open my eyes... Richard W2ONE

The link below is a W8JI article covering the affects of replacing rectifier tubes with solid state diodes.. Replace Rectifier Tubes with Diodes <https://www.w8ji.com/power_transformer_stress.htm> 73

Richard, The fuse is labeled right on the chassis, I see it in your photo! 0.6Amp (600ma) Slow Blow. 73, Gary WB6OGD

Richard's 2B already is running with diodes. Long term reliability could possibly be a problem but I would just get it working for now. 73, Gary WB6OGD

OK - I have replaced the twin diodes with the proper 6X4 tube.? I am now able to finally pick up some code and some voice on the 80 meter band.? Now I need to do some work to improve my antenna.? I

Stan, While you could do it, you'd be giving up a lot. An R-4x receiver doesn't cost that much more than the 2B. The T-4Xx has a spot function, so it should be easy to sync the 2 and 4. But you can't

Silicon diodes have different internal resistances and voltage drops than rectifier vacuum tubes. Before replacing the vacuum tubes I would first model the power suppy to see how it would perform

Hi Ronnie, I am interested in the 2-BQ if it is not too expensive (I do not know what they go for).? What do you want for it? Richard W2ONE

I have a 2-BQ surplus to my needs if anyone is interested I can even send a video of it working Ronnie