Re: [Drakelist] T4XB vs T4XC

Jim - The 'B' will work just fine with the R-4C. It will even transceive, but would require a minor adjustment of the 3rd Mixer LO in the receiver. It's essentially the same transmitter, the only real circuit change is a solid state Carrier Oscillator in the 'C' and a provision to couple

[Drakelist] Harbach Soft Start in L4B

*Hello again, * * In my last post on this I had ordered new parts for the relay board, we got it installed easily enough. When I turn it on we do not hear the click as stated in the instructions, how do I know if it is working or not?? I got all the Drake line set up and even though I've had

[Drakelist] T4XB vs T4XC

Greetings to the group, I have an R4C and a T4XC that I use mostly as 'separates' on CW. A friend has a T4XB that he wishes to sell and I am considering buying it as a backup to my T4XC. I assume the B-line xmtr will stand in fine for the C-line xmtr when used with the R4C receiver ?

Re: [Drakelist] Harbach Soft Start in L4B

Woody - If it's working correctly you should hear the relay engage within about a half second after turning on the power switchyou'll then hear it disengage about a second after powering the amp down. Sounds like you still have some kind of problem with either a part or the wiring. Dino

Re: [Drakelist] TR-4 Crystal Filter

I tried a crude measurement on the working 'X' filter marked SSB 9M 2100 U Why does the 'U' filter peak on the low side of the Center Freq? The 'non X' filter will not pass a signal btw it is marked 2100 L If the 'U' and 'L' are for USB and LSB I am guessing that the USB and LSB are only

[Drakelist] TR4C 40 Meters off frequency

Hi all My Dad (K8ZID) and I are in the process of restoring a TR4C. It is coming along very well and operates perfectly. We have a parts rig so no shortage of spares and replacements so far. Now it hears great, makes full power on all bands, operates like a dream except that 40 meters is

Re: [Drakelist] TR-4 Crystal Filter [[REVISED]]

Paul - I get myself confused every time I try to explain this... Please delete previous message before I get you confused too!!! ** REVISED Because of the mixing scheme used in the TR-4, the filters are NOT really USB and LSB,

Re: [Drakelist] TR-4 Crystal Filter

Paul I have opened several of the filters using a very hot iron and lots of solder wick. I have about 5 or 6 of them. Inside you will find eight crystals and a few disk capacitors. I had planned on trying to take a few bad ones and make a good filter but have yet to try. I suppose a torch

Re: [Drakelist] TR-4 Crystal Filter [[Re-REVISED]]

Paul - I get myself confused every time I try to explain this... I obviously should NOT try this after lunch At least I got the first two sentences correct! :-) Because of the mixing scheme used in the TR-4, the filters are NOT really USB and LSB, but #1 and #2. I know this is