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And for those non-microscopists/ non-biology majors: ?BSE = backscattered electrons?SEM = scanning electron microscope?Bob K3AC

I suspect this is not a plated crystal but a plain crystal held between plane electrodes on both sides.? ?It seems to me that migrated solder would cause a permanent shift in frequency rather than

steve I just ran across this,but but there is not enough info to know if it could be related to your investigation. "This is a BSE SEM image of a quartz crystal that reportedly shifted in frequency.

I have for sale the following 16 Hallicrafters radio items. I can no longer afford the space or time to use them. I have previously operated most if not all of the items. I know some of them worked,

I thought the same thing. Its in the works. *K2WH Bill's QRZ Biography ( https://www.qrz.com/db/k2wh ) * ---------------------------------------------------

Looks like he did a really nice job on it! Kurt Rieger K2NNJ

Very nice.? Seems to me that a matching cover for the speaker?Would also be nice.??Sent from my Galaxy

Just received my special protective dust cover for my SX-17, Nice. *K2WH Bill's QRZ Biography ( https://www.qrz.com/db/k2wh ) * ---------------------------------------------------

Hi Sam , good job on finding the HT45. I am curious what ball park figure they sell for? There is one locally here being sold , it’s in pretty rough shape and both the seller and I dont know what a

Same here whenever I see your calls on here or I believe on FT8. BTW, want real? dyslexia, I worked stations with the following calls: * W2WH * K4WH * W2KH * K2HW *K2WH Bill's QRZ Biography (

I still sm not clear on a couple of things.? Is the double peak on one station only?? And secondly how are you seeing it?? I thought the 62 does not have a tuning indicator, am I wrong?? ?A

Scott and others I am sticking with my first guess for now --two peaks on the IF [ If response is not flat enough] .. but I have no conviction on that. i agree that SMD, even if it is possible in the

Scott, you're right that the SX-62 doesn't have the IF cans susceptible to SMD, but I believe the problem is plain old leakage, not SMD. I'm sure there's information on this on the various boatanchor

I don't believe SMD affects the SX-62 or SX-71, as they have the larger IF transformers that came before the miniature transformers with the Mica caps built in the base.

Joe; i guess you are speaking of SMD [silver mica disease] that apparently seems to make them erratic and then die shorted out and is common in many 455 kH IF transformers for AM etc.? The original

I seem to recall that there's a chronic problem with bad mica caps inside the FM discriminator can. If I remember correctly, those caps can cause all kinds of strange problems with FM performance. ?

Skip:? Its too bad that you didn't get more response from others; i seem to recall this sort of thing on an EICO HFT-90 FM tuner [1959], and /or a Heathkit AR-15 stereo receiver [1969], but have no

Steve; thanks for the clarification. I am only inquisitive now… Its driving me nuts too .. As I see it, you have a generator that really wants its frequency to be “the frequency” and a crystal

Thanks, Richard. I’ve opened the holder twice – cleaned everything (it wasn’t dirty, though), and carefully reassembled. I think it’s just an old design and was considered “good enough”.

Don, The frequency will jump suddenly from A to B and then settle on that for a bit. The changes aren’t slow. 73 – Steve, KW4H From: <[email protected]> on behalf of don Root