[TenTec] Resurrecting Hercules 444 amp
tvman1954 at gmail.com
Thu Oct 18 16:09:08 EDT 2012
*Great call about the AM Radio Mike. I also use them to test Remote
Controls, Switched Mode Power Supplies and to track down Bad Transformers
on Power Poles. Just hold your TV Remote close to a Portable AM Radio which
is on and tuned to no station, and press any button. Do the same thing with
a Switched Mode ( switcher supply ) for your other equipment. My Power
Supply for the Cable Router will take out AM Radio Stations from 2 feet
away. ( I need to cure that ) *
73 cul de Wade/KJ4WS*
On Thu, Oct 18, 2012 at 2:28 PM, Mike Bryce <prosolar at sssnet.com> wrote:
> I am going to take a stab at this but I'll admit I've need had my fingers
> in one.
> First I'd see in in fact your drawing enough current to light the IV lamp.
> If you are, then place a AM broadcast receiver near the pa modules. Key
> the amp with drive.
> If the AM radio sounds like someone is trying to blow dry a wet cat, then
> the amp has some low freq oscillations.
> (Btw... A spectrum analyzer would be nice to have instead of the wet cat.)
> Could also be bad/loose/fubar band filters/switch
> Mike wb8vge
> Sent from my iPhone
> On Oct 18, 2012, at 2:37 PM, Pat Moore <pmoore44 at gmail.com> wrote:
> > I was given a Hercules 444 amp, and I have it working on 160, 40, 20, and
> > 15. However, on 80 M, the I/V light comes on with any more than 10 watts
> > drive. The amp is stable and produces rated power on the other three
> > Any ideas why there's a difference on 80?
> > I know TenTec abandoned this amp when the transistors became unavailable,
> > but mine still works, and I'd like to get some use out of it.
> > Tnx ex 73 de AL7L
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