*** The Ampliphase Ancestry ***
The BHF-100A Shortwave Ampliphase
The BHF-100A shortwave ampliphase was available in 1962, but differed significantly from the standard AM ampliphases. This was due to both the different frequencies involved, and the need to operate over a wide frequency range with regular changes. Although from the front it is not much bigger than the 50Kw AM versions, it is much, much deeper.
Part of this depth was required to house the four PA tubes, but there was also the need to have motorised adjustable coils and capacitors which could be brought into circuit as necssary.
Information on this page was extracted from the August 1962 issue of RCA Broadcast News. My thanks to John Byrns for the copy. Only about 12 of these models were built, and it was not considered a commercial success, even by RCA.
A list of where some of these HF100's were delivered to is on my Anthology page. Thanks to John Stanley and Roger Stubbe for that information. A fuller description of the BHF-100A can be found on the Belgian Transmitters page, here.
If you can shine any light on any version of ampliphase please feel free to contact me. In particular I would appreciate handbooks and photographs for the five and ten. I would also like to find out more about the BBC/Marconi ampliphases of the 1950's. I really appreciate all feedback to these pages. Thanks! |
