[Milsurplus] TBX info

[Hubert Miller]

My understanding is the Army SPF were intended for use by the 555th Parachute Infantry Battalion when it was deployed for firefighting on the West Coast.
This all-black battalion hoped the West Coast deployment meant they would enter the Pacific War against Japan, but they were disappointed.
The SPF was proceeded by two models of the SP. I have one of the models. It is also crystal controlled. There is no issue of drift with the SP i have. 
What convinces you the Forest Service SPF influenced in any way the U.S. Navy ( Marines ) TBX ?  Or that the Navy was even cognizant of Forest Service
efforts - mainly in Oregon ? 
YMMV,  but a mile is a mile is a mile. 
-Hue 


-----Original Message-----
From: w8au at sssnet.com [mailto:w8au at sssnet.com] 
Sent: Tuesday, February 14, 2017 11:19 PM
To: Hubert Miller <Kargo_cult at msn.com>; Military Surplus Mail List <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] TBX info

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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