As i wrote, the components are all OK. I measured them with my LCR meter.
Anyway, the problem is solved... i use the 24 MHz input circuit and it
works perfectly on 21 MHz as well. Not an elegant solution, but the easiest
! 2 wires unsoldered and 2 small pieces making a short circuit between 21
and 24 Mhz rotary switch positions.
Perfect match on both bands and full output power.
> ## Did you actually check the tuned input coil, and the 150 pf fixed cap
> and the
> adjustable cap with a digital LCR Meter ??
> My drake L4B also uses a pair of 3-500Zs, and the caps are both fixed.
> The coil is adjustable....slug tuned. Input swr is 1:1 across the 15m
> ## The L4B uses paralleled 100 pf caps ( total = 200 pf) on the
> xcvr side......
> and paralleled 65 pf caps ( total = 130 pf) on the cathode side.
> ## I suspect that either your fixed 150 pf cap is out of spec, or your
> fixed .34uh
> coil is out of spec. Two paralleled 75 pf caps ( total = 150 pf) will
> handle more RF
> current vs a single 150 pf cap. Your 150 pf cap may well have been out
> of spec since day
> Jim VE7RF
Patrick Egloff - TK5EP
email : firstname.lastname@example.org
Web page : http://www.egloff.eu
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