[Heathkit] Heathkit 572B's horizontal

[Carl]

Doesnt  make any difference as to the brand or country, if not lined up they
sag. Early ARRL Handbooks mentioned it back in the 40's.
The problem with the early imports is that they paid no attention to getting
ANY alignment between the glass envelope and the base. They came thru at any
angle up to about 45 degrees off.

Carl


----- Original Message -----
From: "Kevin J Ward" <kevin_ward@juno.com>
To: <heathkit@mailman.qth.net>
Sent: Sunday, March 16, 2003 12:59 PM
Subject: [Heathkit] Heathkit 572B's horizontal


>
> I believe horizontal mounting requires that the filament pins be oriented
> in the vertical plane; i.e., one above the other.  If I remember
> correctly, filament sag on 811A and 572B's was much more of a problem in
> the foreign made tubes.  The Russian tubes were particularly bad in this
> area.
>
> Kevin  N2IE
>
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