[Milsurplus] TBX info

[w8au at sssnet.com]

Hue:
The data I posted is from a USFS presentation viewed in San Francisco 
in 2005, given by Rick Ferranti, W6NIR.
It corresponds with much info I procured from USFS reps as far back 
as 1980.  I have two of the SPFs produced in
1940 for Army training.  They were never used in the field of 
battle.  The SPF (semi-portable phone) did CW and AM
and was preceded by the PF (portable phone) that was much simpler but 
not stable enough. (mod osc/ regen rx)
Although the SPF did CW, smoke jumpers usually avoided it.

The 5 meter mod osc/ super-regen rx portables developed by Frank C. 
Jones were first used in the buildiing of the SF
Bay Bridge (1934) and the USFS adapted that design for their low VHF 
use, mainly from Tower to Tower, as per the above authority.

There were more radios than the above developed by them but this 
posting was referencing only the relationship of SPF to TBX,
however light that may have been, and whatever inspiration BuShips 
and USMC may have gained from USFS experience.

It would be nice of any the W7 hams in the USFS Montana radio shop 
were still with us to tell their story.
All we can go by now is the acronym YMMV.  ;-)

Perry



At 12:51 AM 2/15/2017, Hubert Miller wrote:

>SPF was certainly not a smokejumper radio. Model SJ WAS a 
>smokejumper radio. Smokejumper portables were the 33-MHz small voice radios
>TBX not at all derived from USFS radios; the TBX did CW and AM with 
>VFO or crystal positions, and with more power than any portable 
>Forest Service radio.
>Forest Service radios, the HF models i am aware of, were single 
>channel transmit, crystal controlled. I see no evidence whatsoever 
>the U.S.N. adopted anything
>like the SP or SPF.  A similar radio, the ATR-4, was developed in 
>Australia, and widely used by its mobile forces and also by U.S. 
>teams in the occupied Philippines.
>I can footnote every statement i've made here.
>-H
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