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that is the issue.. even in Band Config with PTT Transmit enabled (should be 5v) when PTT or transmit..zilch..zero volts..no 5v.. V

Hi Vince, The WA2EBY amp does not need the PTT line.? The QRP-Labs amp requires +5 volts to turn on the amp and 0 volts to receive.? That is configurable in the QDX Band Configuration

ugg...didn't make a diff...better read some more. V

Hi Evan, got it..thanks for that.. 1.? I think i've an issue with PTT on the QDX, I don't have a mini or qcx + handy that is built...have them both in the bag, I've been building QDXs for people now

The SN74CBT3253CDR is a pin-compatible replacement from TI. (The SN74CBT3253CD, without the R, is the same chip in a tube rather than tape-and-reel, but it usually costs more.) Hans is now using it in

Hi Vince, I have used the QDX to drive the QRP-Labs 50-watt amp.? Hans warns that the 50-watt amp is not designed to handle the high-duty cycle of FT8 or other digital modes.? I supplied 13.8 volts

I'm pretty sure I know the answer, but good to ask anyway.. Can I use a QDX as the input to the 50w to test?? Vince

I would try farnell, digikey. 73 Bojan S53DZ

Actually, it looks like LOTA is going to happen. Regardless of what you think about any of the "OTA's", if you operate out in public, consider a small sign that says something like: "Ham radio in

Well, it was amusing at first. Walmarts on the air. But the more I thought about it, the more it became a friendly way to bring Amateur Radio to the masses. Yeah, I know, the serious hams are against

Oh dear…. Check local planning regulations before you erect anything. -- - 73 de Andy -

Hi. I bought four FST3253 chips to replace broken IC3 and IC4 in QDX (probably either a spike from the antenna or a self-oscillating PA killed them, and killed the op-amps... but I replaced the

I’m thinking of COTA, CrackerBarrel on the Air. ?Most aloe RV overnight and a great place to eat. Gary KT7AZ

Forgot to say that it is is using 1.09a firmware. ... Ron [email protected]> wrote:

Don, my 20 meter Mini is a Rev 1 but I have a Rev 3 that I built for 15 meters. It has the AGC and does not have the TCXO. I set it on 20 meters and do not hear any spurious signals in the

Charles, You asked about why 2.4V on IC5's outputs. It's because in transmit it's outputting a 5V square wave at the the operating frequency. On a DVM that high frequency square wave will read

To the best of my memory, the IC5/BS-170 'dance' was as follows (note: The A, B, C denotes the unit # - ie IC5 (A) was the IC5 that came preinstalled): - IC5 (A) + 4x BS-170s (A) - No RF output,

Yes, they killed the sun spots for 11 years. Dave K8WPE PS Always read your email at least once before sending…..the above was autocorrected to say “they liked the sun spots” before I caught

Hi Levent, what you discovered is not a secret cheat. Clicking on the encoder and immediately turning clockwise will bring the cursor left and can be used to change frequency. Using a band below

WOTA is already being used by the Witches On The Air group, and you don't want to mess with them. Remember what happened when the Sorcerers On The Air lot got riled...