|[AMRadio] Globar brand thermistors|
wa5bxo2005 at pctechref.com
Thu May 26 16:20:35 EDT 2005
Those things are really pretty cool. I think they are around 100
ohms cold and about 1 ohm hot at up to 3 amps. They are great for the
primary of filament XFMRs for Xmitting tubes. I used to use them all the
time. We kept them in stock for the degaussing circuits in TV repair but I
haven't seen them for a long time.
John Coleman, WA5BXO
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of Jim Wilhite
Sent: Thursday, May 26, 2005 1:41 PM
To: Discussion of AM Radio
Subject: Re: [AMRadio] 117Z6GT question
George: You might search around for some old "Globar" resistors. Install
on the input line and they will absorb some of that inrush resulting in
longer life for the tubes.
I found a card of them (they were in little packets that one pulled off like
the pull tabs you bought at the beer joint) in little bags. They were used
in TV sets and AC/DC radios. Check for a parts store that has been in
business for a long time and find the guy with gray hair and an unsteady
walk. He will know what you are talking about.
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