I did a lot of experimenting with the crystal filters
15 to 20 years ago on the Argosy. I have all the
paperwork on my experiments somewhere but Can not find
them now. I believe that I ordered my crystals from
Jan's or one of the other crystal company's. I did
find that I could modify the 4 pole up to the 6 or 8
pole and could change them to the bandwidth that I
wanted, I kept many pages of info plotted but it is
among piles of records from the last 30 years.
KO4O
--- "Donald L. Schliesser" <donjan7@earthlink.net>
wrote:
> I have 4 filters in the 6.3 Mhz. IF: 2.4, 1.8, .5,
> .25. They all work,
> but the 500 hz. has less output than the 250 hz. -
> even when I adjust
> the PBT and the FADE/BP controls for max gain. Gain
> is probably 25% or
> so less, but definitely noticeable. Could one of
> the crystals in the
> filter have drifted? Or be bad? I have tried
> "exercising" the
> connections by plugging and unplugging the filter
> per Don Prouty in the
> Ten-Tec service dept. Is this a fixable problem by
> sending back to
> Ten-Tec? Since their hourly rate is $60, maybe just
> as well to buy a
> used one for $60-70 including shipping. Anyone have
> any ideas?
>
> Thanks, Donald K6RV
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
____________________________________________________________________________________
No need to miss a message. Get email on-the-go
with Yahoo! Mail for Mobile. Get started.
http://mobile.yahoo.com/mail
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|