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These are duplicates that I don't need. I haven't tried every one of the programs in my HP8920B, but the ones that I did seem to work fine. It looks like the EDACS tools also does conventional

Yes, well no.? Not ON, plugged in!? If nothing else the fan noise would have driven me (more) insane by now! 73's Skip WB6YMH

Normally the A24 attenuator is easily verified.? If it's the standard 60 Watt input than you should see 14 dB. But if brings the measurement back in line than you should see something different.?

With the 8924C, leaving it on is quite different to leaving it plugged in. I can understand not leaving it on. Besides the wear and tear, it consumes a fair amount of power, and more importantly to

Good idea to not leave it on.? 14 years of solid ON is really extreme and probably a "personal best" for all of us gathered here. ______________________________________________________________

Confirming the usual, replacing the 47 uF fixed it. That capacitor had been replaced in 2009. I don't use my 8924C regularly, but it's been plugged in 24/7 since 2009 "just in case". I really don't

Thanks.? I have replaced the load resistor in the A24 assy., so It is a lot better than it was before. It looked like the user had left the TX on while he went for lunch! I think I will believe the

Hi Bill, I have an 8920 and the power supply is also dead. A fellow ham said he could fix it - but that is now 2 years ago. I know nothing about switchmode power supplies so am not prepared to touch

On the 8924, which is like 8920's, there is a PERCAL or periodic Calibration internal routine. You need well calibrated 6 digit voltmeter & one of the steps is to enter reading of + & - rails on the

Tru Dat! I have found as much disagreement among a handful of Bird slugs and/or cables.? There is actually a closed loop test for the 8920 to verify your cables first.

I would tend to trust the 8920 more than the Bird. IIRC correctly the Bird wattmeters are +-5% of full scale ...not sure what slug you have in the Bird .? If that's a 100 W VHF slug you are +- 5

Hi Bill, I listen to the normal gaggle of 2m repeaters so you can find me there. Tied up with WARG (again). Re your calibration against the Bird, is the Bird a good reference? Happy to have a chew of

Your Bird 43 is likely far less accurate than your HP. The elements include a potentiometer that is prone to shifting or going ‘rusty’. Some even fail open circuit. I took an element apart once

Hi Robyn, I see we are both VK6 ... and proud owners of these great instruments. I have been into the PSU?on my 8920A also.? At last all is going sweet. Perhaps we could support each other with some

Hello all, I have finally got my instrument going well, NO FAILURES? :) The one thing left is to adjust the reading to agree with the value of watts at the rf input, measured with my Bird 43 watt

Thanks, Yuri I suppose this 28C256 originally attached in the unit is broken. James

Hi John, Thank you. Hmmm, I gotta say that I'm suspecting the processor board right now. Yes, if the blank 28C256 is attached, checksum error only pops out for the very first time. After that first

Re: [HP8920/8935 Family] 8921A PCBs required Hello, Friday, December 29, 2023, 10:31:48, chinesejames1990 wrote: Thanks. Umm should I fiddle with my programmer to see if I can make some adjustable

When my 8924C died a few years ago, it was the little supply that keeps the OCXO warmed up. The rest of it wouldn't work without that. Getting to that little supply was a headache, but a couple of