[Hammarlund] HC-10, seems mighty hot running!

[SP600historian@aol.com]

In a message dated 6/7/2003 2:59:36 PM Central Daylight Time, k06bb@elite.net 
writes:

> Hi.
> I now have my SP-600 set in one of the DXing positions for burn-in and
> checkout.
> 
> Then this morning I did a "brief" looksee inside the HC-10, cleaned the
> controls and switches etc and then tuned it to the SP-600 IF output, finding
> the Notch coils was tuned way off resonance. Found no ugly black capacitors
> (BBoD's) or such in it and the PS filter can seems good so it too went onto
> the listening bench, connected to the SP-600.
> 
> Right now I'm listening to the West Coast swap net on the combination and it
> seems to do very well.  Much better than trying to copy SSB on the SP-600
> alone.  The combination appears to be very stable, at least in the 40 meter
> band.
> 
> QUESTION:  The HC-10 seems to get VERY warm on top.  Is this normal for this
> unit?  There doesn't appear to be any electrical problem in it and the
> cabinet is well ventilated (the typical "Holy Hammy" case).  Guess it'll be
> useful for keeping my coffee hot in the winter 8^)
> 
> 73 de Phil, KO6BB
> DX begins at the noise floor!
> k06bb@elite.net
> Merced, California
> 37.18N  120.29W  CM97sh
> 
> 

Hi Phil,

Yes, they run HOT, the SPC-10 also runs HOT. You have a couple of choices, 
remove the 5Y3 and solid state it with a dropping resistor. Or, use a small 
muffin fan (I used a 4") on top and DRAW the heat away from the chassis. I ran a 
SPC-10 like that for over 3 years.

Les Locklear


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