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Some things followed me home this weekend. In addition to my TR7 parts, I got several "bonus" items. Let me know if you recognize any of these pieces, or better yet let me know if you need them. --

" I am done for the night and will not press my luck. I have done nothing else yet, no tubes pulled / checked, no switch contacts or tube sockets sprayed with Deoxit D5." Congrats Dave, and you're

Dave, when you get this running better, please let me know how it’s working in 10 in tx/rx. Right now, I’m working on a TR-3 and a very early TR-4 and both of them are not really all that good on

Randal, This is exactly what I was trying to do. I have a key in the key receptacle, no mic in the mic receptacle, and when I switch to X-AM, the audio goes dead. To me, that doesn't seem correct and,

Mike, Thanks for the explanations below. In my case, I have a key inserted in key jack so switching to X-AM would only transmit with the key down (I don't have a microphone inserted - yet). With it

Having just listened a bit to some AM on my TR-4, ?and having read Mike's comment, I'll point out that the manual indicates that you can receive AM in the X-AM function switch position. ? I have a

That would work too...... but they have to be sized correctly.? ?They run hot, and have to stay hot.? ?IE:? no forced air on them, or their resistance will increase. The op did not tell us what

Barry, To receive AM with the TR4 the Function switch must be set to "SSB" not "X-AM". Setting the Function switch to "X-AM" will key up the transmitter, disabling the receiver. Operating AM with the

On my TR-4, when I switch to AM mode I get no audio output at all. Can someone please suggest a way to troubleshoot this? I thought that if I touched the grid of the last audio amplifier with a

Thanks for the suggestions guys. There was no jumper on the RV3 VFO socket. I have installed a 8 pin plug with pins 2 & 8 jumpered. It is amazing what happens when something is connected properly!

Or a NTC surge limiter in the AC mains side of the power supply. "Jim VE7RF via groups.io" <jim.thom@...> wrote: -- 73 -Jim NU0C

As a side note, not all step-start controls are really what one would want. ?One particular model (still in inventories) is no longer made and is not a step-start even though it is advertised as

Wasted effort.? ?You would be better off to do any surge limiting with an outboard step start circuit.? ?Like a 20 ohm resistor in the hot leg? of the incoming mains.? ?Then shunt it after 2-3

When I used to work on computer motherboards, the memory batteries were of different sizes and shapes. I found a battery holder source, maybe in China? As long as it would fit the board it worked

Hello everyone, I’m trying to get a RV-3 and a RV-4 working again. When I put the VFO in receive only it causes the radio to trip into transmit in a cycling manner. ?I cleaned wafer switch very

I got a note tonight from Terry Perdue K8TP that some of us are ordering his CD through PayPal (me included), and if you use the F&F mode Paypal is not sending him your address. I thought it always

Sorry, that was supposed to be an off list email. Stan

Ok. Do you have a PayPal account? 73 Stan KM4HQE

Not much to do with anti-surge devices, but the supercapacitors reminded me of... I did something with batteries. I wanted to power a near legal-limit linear off 125V. So I modified a Panasonic

I'm not following the intent here.? The power-on surge is a surge in current.? Capacitors are voltage devices, primarily.? Please elaborate. Eric WK3B