[R-390] R-390A IF deck caps in T501 or T502

[Larry H]

Dave, I tested the new cap only for leakage at the rated voltage (500 v)
before installation.  After installation, for correct operation during warm
up.

Regards, Larry

On Tue, Jan 22, 2019 at 12:09 PM dog <agfa at hughes.net> wrote:

> Larry, how did you test the 200pf caps? Did you test the actual cap? I
> haven't replaced mine yet, procrastinating.
>
> Dave N3DT
>
> On 1/22/2019 00:14, Larry H wrote:
> > I received the 200 pf caps today that I ordered from Just Radios.  I put
> > the original 39 pf cap (with -30 tempco) back in, that I had removed, and
> > installed the new 200 pf.  It's working great.  IF warm up shows very
> > little drift and good stability.  The size is very good for good fit with
> > ample room in T501.  Both coils peak with ample tuning on both sides.
> >
> > Regards, Larry
> >
> >
> > On Wed, Jan 16, 2019 at 1:20 PM Larry H <larry41gm at gmail.com> wrote:
> >
> >> Hi Dave,  Sorry your posts are not getting through.
> >>
> >> The 5% are fine as long as it will peak on adjustment, which it should.
> >> Does 1 or both coils not peak in yours?  The easiest way to check is to
> rx
> >> in cal, tune to signal, measure dc on diode load.
> >>
> >> Regards, Larry
> >>
> >> On Wed, Jan 16, 2019 at 7:20 AM dog <agfa at hughes.net> wrote:
> >>
> >>> Larry,
> >>>
> >>> For some reason my replies to the 390 list are not getting through. I
> >>> might have to re-register, don't know. Anyhow, I've been having the
> same
> >>> gain problem. I traced the jump in gain to T502 after much fiddling,
> but
> >>> didn't get much farther, I sorta got burned out just finding that. I
> had a
> >>> thread on it last summer. I have a bunch of dipped SM caps but they're
> 5%.
> >>> Is it that important they be 2%? I thought that was what the
> adjustment in
> >>> the coil is for? Oh, I see I've got a 200pf  5% 500V one. I may have
> >>> another if I look through the pile. Most of what I have are 270pf. The
> 200
> >>> is fairly small too, only 3/8" at the widest.
> >>>
> >>> Dave N3DT
> >>> On 1/16/2019 00:02, Larry H wrote:
> >>>
> >>> Still Holding.  I ordered 20 of the 200 pf from justradios.   Hope
> they get
> >>> here soon.
> >>>
> >>> Tomorrow I celebrate with Kielbasa and cold brewsky.
> >>>
> >>> Regards, Larry
> >>>
> >>> On Tue, Jan 15, 2019 at 6:21 PM Tisha Hayes <tisha.hayes at gmail.com> <
> tisha.hayes at gmail.com> wrote:
> >>>
> >>>
> >>> Yea, at the prices for mica caps you definitely do not want to be
> >>> shotgunning the replacements of those things through the deck.
> >>>
> >>> *Ms. Tisha Hayes, AA4HA*
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