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I'll be sitting down later today and putting all of these nets into a matrix. It seems that Saturday has more availability from a number of nets/time-scheduling standpoint. I'll identify the times

Yes. You can also tell by the newer ball detent that's held in place by a leaf spring. What is the serial number of this one? Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana.

Thanks Steve, you are da man. I must have a late T-4X, can't tell because the serial number rusted away, hi hi. I will pull it out today or tomorrow and take photos, Dave pull yours and we can see if

IIRC, the last T-4X's have a switch layout that is identical to the T-4XB and they have the same number of wafers, whilst the earlier T-4X's had one less wafer. I was going to try and update a T-4 to

The very latest T-4X’s have the same switch. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from Proton Mail for iOS

C Line switch is different. The power control moved there, so I’m betting that there are other differences. I may also have this switch in a carcass that has yielded up spare parts for me for the

Dave: Wouldn't you know it's one that's buried in wiring too....makes ID pretty difficult from a picture. Remind me again....is it a T-4X or T-4XB you need this for? I can pull either one (or a T-4XC)

Yes, that's the switch in the bottom center of the picture with the three switch wafers it's the rearmost wafer that I need. Gary W0DVN struck out finding one in his stash of wafers Dave

The config in my photos is stock. The bushing on the shaft is there to isolate the mode knob from the bandwidth selector. Yes, this rig had some corrosion from humid storage. But that's merely

Dave: Probably not the same. I'm not at home so cannot start digging into the details.I will be home in a few days though, and can check out what parts I have/don't have and even if the switch isn't

Does it look like that? Is anyone and expert on T-4Xx mode switches? Steve? This one is in a late T-4X (I think its late), Dave needs one with 3 sections like this but for his T-4XB. 73, Gary WB6OGD

YES

Send it to the group too. I have a late T-4X that might be the same. 73, Gary WB6OGD

If you think the R-4B audio is good, you should listen to an R-4A(early). Unless.. your R-4B has the Sherwood product detector mod. Notice how your S-meter moves on SSB signals. If it moves up and

Nice write-up. You found two of the most common TR7 failures, both on the PS board. C2108 us the only capacitor on my "must replace" list for the TR7. It is not a matter of if it fails, but rather

Peter, Not sure if the T4XC is the same it has a 4-wafer switch the T4XB is a 3-wafer switch.? Unfortunately not only is the contact gone, but the wiper has a big chunk missing as well I think it's

Follow the Schematic in the Service Manual and build one, See the following link for details of the display jumper board The perfboard and the 0.156 pins are bought from Mouser or Digikey. The perf

Dave: If Gary can't help you, I have lots of T-4XC parts that are probably the same. Get back to me if Gary cannot help. Even a single contact CAN be replaced, though not an easy exercise! 73 Peter

I wish someone would tell me why in the world ANY net for Vintage (or any other HF radio for that matter) would list a "Net" frequency on a 1/2kHz "channel"? Why exclude the vintage Marine, commercial

Okay, this will take a while lots of wires to remove and label I'll send pic's tomorrow. Thanks, Dave