开云体育

FWIW i opened the filter compartment of my HQ 129 X? the crystal is in a holder similar to the one pictured in the SX110.? Itried tapping it.? Did not change frequency or have any effect on the

I’m still curious; does the frequency jump suddenly from A to B, or does it settle for a bit on a variety of frequencies? or is it a slow change? Don VA3DRL Sent: Thursday, November 3, 2022 4:42 PM

Steve it Took a bit of work for the old gray matter to digest your last comment, and i will ditto your first line. 73 Don VA3DRL Sent: Thursday, November 3, 2022 7:51 PM To:

Good luck to you both, please keep us posted! And by the way, Bill, whenever I see your callsign I get a bad case of dyslexia. ? 73 – Steve, KW4H From: <[email protected]> on behalf of

Good luck again and your enthusiasm is contagious. * K2WH* *Bill's QRZ Biography ( https://www.qrz.com/db/k2wh ) * -----------------------------------------------------

That's really interesting, Bill. I'd never even thought about that, but what a brilliant way to check on local oscillator drift! I really must get on with my SX16 restoration but it's going to be a

??Hmmm... a few more comments, Steve - You align the IF's, peaking each at the frequency you've determined the crystal best "sings" at. For example, at least using a SA, for a 455 kHz crystal

The crystal in my old super pro is rather large . It is in a bakelite holder with removable electrodes.? It's been a while since I've been into it but I don't remember it's being spring loaded or

FYI – I stumbled across this video, which helped answer some of my questions. The focus was the SX62, but the principles and circuitry are nearly the same. It was some of the best 30 minutes of

An update. I just did another crystal alignment and yet again found the right spot and re-confirmed the crystal oscillator frequency null is at 453.410 KHz. However, there is no doubt that merely

Perfect. Woulda thunk it? Thanks. Dan WB4GRA

Hi Dan, You wrote: But a loose mounted crystal wafer rattling about and being OK isn't an intuitive conclusion. Like to learn more about that. There is several examples of old radios using a “loose

Scott. You are trying to set the signal generator and the pitch control to the xtal frequency simultaneously. The remarks column gives the procedure. The sig gen will peak at xtal freq, the pitch will

Yeah, thanks for the reply. I am really interested in your ongoing experience here. I've measured actual IF crystal resonances of crystals both in and out of the radio - usually by sweeping them with

I'm a little foggy on this, but I believe you are supposed to set it for highest output I think ________________________________ Sent: Thursday, November 3, 2022 2:26 PM To:

So – this is something I’ve gone over and over again in the alignment instructions and I can’t find an answer. Hallicrafters wants the IF aligned to the frequency of the crystal (which is almost

My perspective is somewhat odd – every boat anchor I restore is a learning experience. I tend to fuss around with things not because I’m unsatisfied, but because I’m curious. On the crystal –

Hallicrafters Cyclone III wanted in excellent condition with HA-20 remote VFO.? I can be contacted at my ARRL.net e-mail address. Paul, W9AC

? ??Is it just me (always a possibility!) or have we lost some perspective here? ? If you're getting +/- 50 hertz out of a 61 year old single crystal filter in a $160 radio made when

Remember Jack that got booted from the forum for totally going off topic? Being old is fine, but do it in your own head. I use the tracking generator on my hp8920 to look at the crystals when I