3-500's

[john]

It does indeed. I can tell you that it's there for a reason (having taken 
mine out!)
:-)
John K5MO


At 01:12 PM 5/9/2005, Garey Barrell wrote:
>Brian -
>
>I believe the SX-101 originally had a "Damp-Chaser" (wirewound resistor 
>enclosed and mounted under the chassis) in it.  I "may" have also run the 
>VFO tube continuously on a separate filament transformer.  Perhaps you 
>Damp-Chaser is open?
>
>73, Garey - K4OAH
>Atlanta
>
>Drake C-Line Service Manual
><http://hr99.home.mindspring.com/R-4C_Servicez/>
>
>
>
>Brian Carling wrote:
>
>>My SX-1010 is here and plugged in, but is as cold as a cucumber!
>>
>>Hmmmm - was it modified, Jerry?
>>
>>Jerry Forwood wrote:
>>
>>>Hallicrafters SX101's and a few others had the filaments on as long as 
>>>the radio was connected to the AC line to help stop drift.
>>>
>>>
>>>73 de Jerry, KØEJF
>>>E.J.(Jerry) Forwood
>>>
>>>-- Neil Morrison <neilsmorr at HOTPOP.COM> wrote:
>>>I'd do it. Filament power won't hurt anything. When my grandmother got her
>>>first color TV set I rigged it so the filaments stayed on continuously. The
>>>thing ran for years and I never had to touch it - never replaced a tube in
>>>it - well worth a little extra power.
>>>
>>>Switching the filaments on and off is what kills them. The first vacuum tube
>>>computers ran continuously like that too.
>>>
>>>Neil
>>>
>>>
>>>----- Original Message ----- From: "Dave Leisman" <wb8baf at VOYAGER.NET>
>>>
>>>
>>>
>>>
>>>>I just purchased a pair of new 3-500 zg amplifier tubes, and I have
>>>>been told that they need to be "broken in", e.g., that I need to put
>>>>them into their sockets, and turn on the amp for 10 hours of filament
>>>>voltage before applying any exciter power to the amp.
>>>>
>>>>Also, I was told that when I finally do apply power to the amp I need
>>>>to do so in increments of 10 watts, starting at the 10 watt level up
>>>>to a maximum of 100 watts.
>>>>
>>>>I'd sure appreciate some input here.  These tubes are expensive and I
>>>>don't want to mess these up, but on the other hand simply leaving this
>>>>amp turned on, and unattended, for some reason, makes me nervous as
>>>>well.
>>>>
>
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