A bit off topic question

[Misic, George J.]

Randy and Aatos,

Right you are; the 3-500Z and 4-XXX families of tubes are intended for
base-down operation only.  You might consider the 572-B / T-160-L tubes, but
stay with United Electric or Cetron.  Not all of these tubes like being on
their sides [like 811As], and they must be run in a particular plane.  The
Dentron Clipperton-L and Clipperton-QRO used the Cetron 572-B in a low
profile amplifier with great success.

George KE8RN
"One of the hams once at Dentron"

-----Original Message-----
From: Randy Kaeding [mailto:rkaeding at HEATHKIT.COM]

Aatos:

According to the tube specification sheets, both tubes must be mounted
vertically, either right-side-up or upside-down. In short, the answer is
no--they should not be mounted horizontally.

Randy, K8TMK
"One of the Hams (still) at Heathkit"

-----Original Message-----
From: Heathkit Owners and Collectors List

Hello!

Does anyone knows based to experience,if 3-500Z
or equivalents including 4-400A,could installed in horisontal positions
securely without fear of future problems.
I am planning to homebrew one tube small boxed tiny amplifier for about
600Watts output,and I should like to know that surely before going on in the
project.

73's

Aatos OH8JEP

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