[Hallicrafters] Loudenboomer inquiry

[brian.k.harris at philips.com]

I'm doing some research for an article concerning Radio Industries' Loudenboomer Mark II amplifier.  As most of you probably know, the Loudenboomer was the basis for the HT-45.  I am trying to determine about how many Loudenboomers were built of each of
the different variations.  I'm not looking for HT-45 information.

The Loudenboomer photographed for the front cover of my original pre-Hallicrafters Radio Industries manual has a cover that has a circular area with perforated holes for ventilation.  This covers wraps over the sides about an inch from the top.  It
attaches with screws or Dzus fasteners on the side.  Let's call this Version 1.

The cover on the Loudenboomer I have (Serial #311) does not wrap over the sides.  Rather, the cabinet wraps over the top, somewhat like S-line cabinets do.  The top is held in place with four Dzus fasteners.  The front panel has a white rectangular label
with a large lower case 'r' and a smaller lower case 'i'.  The dot over the 'i' is part of the 'r'.  Let's call this Version 2.

The Loudenboomer photographed for the manual after Hallicrafters acquired RI, has the same cabinet but the front panel logo is different.  It has a partial circle in white that surrounds an upper case 'R' and there is the typical Hallicrafters lower case
'h' at about 4 o'clock in the circle.  Let's call this Version 3.

If you have one, I would appreciate knowing which version you have, its serial number and if you have the original power supply (they were optional).  If you have any other information concerning this amplifier or Radio Industries in general please share
it.

Thank you and very 73,

Brian K. Harris, Senior Field Application Engineer, WA5UEK

Philips Semiconductors
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EMAIL brian.k.harris at philips.com