[Hammarlund] 'Lytics for SP-600?

[Al Parker]

Hi agn Phil,
    I"ll echo Bob's thought, go to my website & click on the filter cap
rebuild to see a smaller one done for a Drake rcvr - it's easy.  But I'll
also echo Bob on what you have - I've seen quite a few of them from
SP-600's, haven't found any that HAD to be replaced, but have repl. some
with discrete caps.  I do ck ESR, don't think I've ckd actual C on them.
    Since it's hidden under the chassis in this case, I don't think resale
value suffers if done with discretes.  I sure wouldn't spend $30+ to do 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.
>  A couple quick questions.  (Ain't I pain in the backside?)
>
> I plan on also replacing the 'lytics in this receiver (naturally).
> "Normally" I just use common axial lead capacitors in my BA's, either
> removing the original can or leaving it in for cosmetics. I usually also
> often increase the values by about 50% or so as I've found it often
reduces
> residual hum in high quality headphones (though I don't go overboard as it
> can wreak havoc on rectifier tubes).  (I've been working on radios since
the
> mid 50's)
>
> The quick questions.
> I'm considering "biting the bullet" and buying an expensive can for this
> receiver as I feel the set is well worth keeping as original as possible.
>
> 1.  Modern cans (FP) have the case common while the SP-600 uses a separate
> ground pin. Has anyone experienced a "ground loop" (extra hum) by clamping
> an FP can in the original clamp? (stereo amps can be susceptible to this
if
> grounds aren't kept straight).
>
> 2.  I read on at least one of the sites about using "High ripple"
> capacitors?  Is this something new?  Now, the only thing I've really heard
> about being critical in filters is using "Low ESR" caps in switching
> supplies or high temp caps (100 degree) in high temperature areas.  For
BA's
> I've always just used good quality capacitors.
>
> 3.  Receiver "resale value" wise, Is it "really" worth spending the 30-35
> bux for a can capacitor to keep the set original, or would I do just as
well
> to buy three 3 dollar axials and installing a couple terminal strips?
> (Budget is always a big consideration here).
>
> 73 de Phil, KO6BB