[Milsurplus] TBX info

[George Babits]

Is the SPF being confused with something here?  It bears no resemblence to 5 
meters at all.  If I remember right the SPF covers around 3 to 5 MCs give or 
take.  The last couple I had were crystaled up for the "back country" 
freuency around 4.6 MC.  As late as 1984 the forest service still "claimed" 
3.325 as one of their frequencies.  I've seen pictures of CCC guys using 
them pre-war.  They continued in use well into the 1960s and I've known 
several people who used them in the field.  Back in the 1980's I probably 
rounded up a8 to 10 of them locally (Salmon, Idaho.  I wouldn't be suprized 
if those Hue has came from me via the Yellow Sheets.

73,
George
W7HDL


----- Original Message ----- 
From: <w8au at sssnet.com>
To: "Hubert Miller" <Kargo_cult at msn.com>; "Military Surplus Mail List" 
<milsurplus at mailman.qth.net>
Sent: Wednesday, February 15, 2017 12:18 AM
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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