Coils

[KE7NL - Jack]

de KE7NL

I picked up a Heath SB-620 Panadapter.  It is set up for the Heath 3395 kc IF.  I have been able to collect a bunch of info on how to convert it to 455 kc IF.  Also, I have some of the coils for other IF freqs (not 455).  I can use these as forms to wind the replacement coils that I need.
The Questions:
Does anyone have advice/expertise/encouragement/hints/kinks on winding RF coils?
Does anyone have a coil winding machine to sell, loan, give, use, watch?
Before I destroy them, does anyone need specific coils for a SB-620?
TNX
Jack

[Vortex Joe - N3IBX]

Jack,
      Just an educated guess: Why not use a grid-dip meter to determine the frequency of the coil you want to wind? If you can get your GD Metros to oscillate a stable frequency, tune it into a receiver and wind your coil accordingly. Just a suggestion.

As far as a coil winding machine, I seriously need one around my shack. Think of the possibilities one would have with a good coil winding machine and a stable grid dip meter!

If I come across a "deal" on one I'll let you know, and please do the same for me.

Best Regards,
                  Joe Cro N3IBX

[Glenn NY4NC]

The problem is that most Grid Dip Meters don't go down to 455kc. There were a few old boatanchor GDO's that did go low, I think Millen, and Measurement Systems? <name?> had a LF coil set.

I would'nt destroy the 3mhz coils Jack, why don't you try retrofitting a 455khz I.F. can? plenty of those around. that should work if the coil needs to be resonant at 455kc. You may have to experiment with the coupling winding.. shouldn't be too difficult.