[Test-Equipment] TV-7 Issues

[eric lemmon]

It depends upon which specific version of tube tester you have.  Are you
inquiring about the TV-7/U tester, or the TV-7A/U, TV-7B/U, or the TV-7D/U?
There are differences in the screen circuitry among them.

If you haven't already done so, you can download the TM 11-6625-274-35
manual, along with the three other TV-7 series manuals at the LOGSA site.
Go here and search for "11-6625-274-"

<https://www.logsa.army.mil/etms/index.cfm?fuseaction=viewsearchform&CFID=14
35142&CFTOKEN=367df3016affc2b3-B53B48E3-DA0B-79EC-3C0262D4A8DFA81D>

73, Eric Lemmon WB6FLY


----- Original Message ----- 
From: "k2cby" <k2cby at optonline.net>
To: <test-equipment at mailman.qth.net>
Sent: Friday, July 12, 2013 9:57 AM
Subject: [Test-Equipment] TV-7 Issues


>I would like to correspond off-list with a TV-7 maven.
>
> Specifically, does anybody know why the R129 - R130 network was designed
so that the screen voltage goes up whenever the control grid voltage goes
down
> (becomes less negative) rather than making one independent of the other?
>