[Hammarlund] SP-600 Capacitor C97

[Al Parker]

hi phil,
    Yes, C-97 is 65uuf, 500vdc, +-2%, mica, Aerovox #1469(special).
Apparently the "special" refers to the value, as C-37, -57, -67 are also
#1469 but are 85 uuf.
    I haven't found one of these (C-97) to be bad, but have had one in T-6,
the BFO can, bad, and also 1 or 2 micas in an SP-200.
    The big TM11-851 tech. manual suggests removal of T-2 for replacement of
any part in it.
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
http://www.hammarlund.info

----- Original Message -----
From: "Phil Atchley" <k06bb@elite.net>
> Hi.
> I'm doing a "preliminary" alignment on the SP-600.  Gain seemed a little
low
> on bands above 7MHz (2nd mixer).  I checked the 3.5MHz Oscillator,
frequency
> is only about 20Hz high as measured on the Yaesu VR-5000 receiver (in LSB
> mode), so the Xtal is good!
>
> Anyway, I found I had to tune the slug of L33 nearly all the way in to get
> any semblance of normal gain (L34 is "normal").  This indicates to me that
> capacitor C-97 is either open or changed value (decreased).  IS THIS A
> COMMON FAILURE IN THESE SETS?
>
> Another Question?  Schematic shows C97 as 65pF.  IS THAT RIGHT?  Before
> cutting this one out I want to make sure I have a replacement (not easy to
> get in there without removing the Xformer).  If it is I have some 1000VDC
> Silver Mica 68pF 5% capacitors that should work just fine.
>
> So far I'm very pleased with how this set is coming along.  I had to stop
to
> do some home repairs (air conditioning) but the set is progressing quicker
> than I'd hoped.
>
> 73 de Phil, KO6BB