sb101,102,hw101.

[oh8jep]

Hello from Finland!

Well,  Bob did you really mean that you'll put this resistor combination in "short" circuit over the 12,6V
filament? You have calculated so,I think James is right
putting that resistor combination IN SERIE on the filament line that solution makes the correct results.
The resistor combination will be well capable for this current on that line,and does not any harm for the power
supply,I think the result against the power supply is opposite way,it is reducing the current as well as the watts
in complite circuit.
So,not any april fool hi!

Best 73 de Aatos OH8JEP


----- Original Message ----- 
From: "Bob, WB2UJD" <BobbyTrip at AOL.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Thursday, February 06, 2003 3:00 AM
Subject: Re: sb101,102,hw101.


> In a message dated 2/5/03 3:17:21 PM Eastern Standard Time, w2jjm at MSN.COM
> writes:
> 
> 
> > This line of equipment was designed when AC line voltages were much lower
> > than they are today. If you want a cooler running rig with no loss of 6ea8
> > and
> > 6au6 tubes due to leaks and shorts the solution is easy. In your HP-23
> > power
> > supply install four (4) RS-271-131 one (1) ohm 10 watt resistors all in
> > parallel
> > in the 12.6 volt feed lead. This 0.25 ohms will bring your two filament
> > strings
> > down to mfgs specs of 6.3 vac. If there is any small imbalance left you may
> > wish to hand pick your pilot lites. Good luck.
> >
> 
> James,
> 
> You are kidding, right?  Is it April fools yet?  12.6V/.25 ohms = 50.4 amps,
> or 635W.  Did you mean 10 ohms? (63.5W, nah)  Did you mean 100 ohm resistors?
> (6.35W, maybe).  Whatever the value or power drawn, lets not forget to make
> sure that the transformer can supply this additional load without exceeding
> its rating, making it run hot, etc...
> 
> On a hunch I looked at the Shadio Rack site, and yep, you mean 1 ohm.  What
> gives?  Maybe you mean .25 ohm in series?
> 
> Bob, WB2UJD
> 
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