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Couple photos of this mod:

Wayne, Let us know how the FSQ works out. I'm interested in it too. I'm going to try listening on 7105 tonight if I can get something set up. I have a 40M Phaser rig I can move to 7105. I'm in

Easy, shove a short circuit across the PA to ensure that max power is being sent through the device under test. When the device under test gets too hot then you know it's not safe. Step 3. Increase

Only BS170's ? Not 2N2222's, BC108's, MPF102's ? Erm, ANY? semiconductor is more fragile than a lump of metal elements inserted in a vacuum tube because EVERY semiconductor relies upon a fragile

Thank you for the info! I'm in the far SE corner of GA. I'm gonna try to get into tonight's net and see what happens. FSQ looks to be a fascinating technique. Wayne

I am aware of two FSQ nets that are conducted out of TX and OK that you may be able to reach. They are a regional group affiliated with AmRRON, but I believe all licensed amateurs are invited to

https://github.com/WB2CBA/QDX-PA-MODIFICATION/tree/main 73 Barb WB2CBA

Hi?Ryuji I totally agree. It is an engineering?attitude that has spawned over 20,000 kits with the same PA. I don't think any more words are necessary. 73s Ted 2E0THH

Jerry, I have only used my U3S for digital modes (mostly WSPR), but I am pretty sure the TX time is based on the length of the message. With WSPR, that message is set at about 1minute 50 seconds or TX

L504 is the RFC in the LPF selection PIN diode bias circuit.? Per the operating manual, the maximum value that can be set on the configuration screen is 60ma.? I would suggest that is the minimum

Keith, I should have mentioned before that the binocular cores have been known to have sharp edges.? I take a small round file to all that I wind.? Inspect the holes of T507 to see if they have a

Progress. You also have to take into account the calibration time. If you were to set the calibration parameters to say, 10 060 and frame 02 start 02 it should transmit for your 40 second, calibrate

Wayne, There is a group that does FSQ this evening on 7105 center freq. usually starting when ever the 30M Feld Hell Club net is over, normally around 8 pm Central time. Most of the activity is in

Andy, Thanks for the help. I found out that what I thought was the radio transmitting continuously was actually just the Si5351 running but not actually keying the amp. I was listening to it on a

I need to replace the QMX 47 uH SMD inductor L504 (2012 package). What minimum current rating (mA) should it have?

Nick, that makes sense and I'm sorry to hear what happened on your board. Your measured S21 looked good enough for the US standard assuming no harmonic is stronger than the fundamental and the 40m

That's an interesting observation, but I offer another angle to look at it. For the record, my first transceiver was TS520V, and I'm also familiar with 6146. But BS170 is more fragile than 6146 or

Thanks Evan! ?I will be working on T507 today! Keith N8CEP

..... and Hans, it is quite simple. You just do things that are appreciated and avoid other. Hahaha. Appreciated things: - HAM HF HW and SW brainstorming - (C) programming - soldering - testing -

Thank you very very much Ron.? I'll send it to you.?? Britt