[ARC5] AN73 Antenna Coax Connector

[WA5CAB at cs.com]

SIG 5 doesn't specifically say that the adjustment of AN-72 was motor 
driven but I'd guess it's a safe assumption.

Yes, AN-104 has a UHF connector.  Forgot to mention that.

The AN-74 ran up to the -B model so one could infer that it stayed around 
longer than AN-73.

PL-(*)-170 is the 18-pin connector.  The coax one is PL-P-173 or PL-Q-173.  
I don't have any left except for a pair on a cable from SCR-624.

I would assume that 7' shown in the Chesson (or Chesson-Downs) list is in 
error.

In a message dated 6/7/2011 3:23:09 PM Central Daylight Time, 
kk5f at earthlink.net writes: 
> >OK, I finally thought to check SIG 5.  AN-73, AN-73-A, AN-74, AN-74-A 
> and 
> >AN-74-B are all for use with SCR-542 and SCR-522.  AN-73-(*) covers 
> 100-125 
> >MC.  AN-74-(*) covers 125-150 MC.  Described as streamlined steel tube 
> with 
> >streamlined phenolic base except AN-74-B has pressed wood base.  All have 
> 
> >Connector SO-153.  Replaced AN-72-(*) (adjustable length).  Replaced by 
> >AN-104-(*),   SIG 5 does not give lengths for any of them.  SO-153 is 
> also 
> >used on Rack FT-244, p/o of the radio transmitter and receiver with no 
> combined 
> >nomenclature used with SCR-542, SCR-522 and SCR-624.
> 
> That answers a host of questions.  I have manuals that describe the AN-74
> as part of installations, but nothing that mentions the AN-73.  I suppose
> the AN-74 must have been more common in the era of early VHF sets 
> operating
> around 142 MHz.  It also makes sense that an aircraft with an AN-73 or -74
> would be improved by replacement of that mast with the AN-104 which 
> provides
> full coverage for the VHF sets of that time (100 to 156 MHz).  I've never
> seen a AN-74 "in person" and I did not know what connector was at the 
> bottom.
> The AN-104 definitely uses the common SO-239, another improvement.
> 
> I thought that the plug (PL-170) for the FT-244's oddball coax connector
> SO-153 was still pretty readily available.  Isn't that associated plug 
> then
> what Steve is seeking?
> 
> I like the mention of the AN-72 adjustible legnth antenna.  That must be
> the nomenclature of the antenna that was to be controlled by the BC-602-A
> control box for the SCR-522.  I'll bet not many were made.
> 
> I guess the "seven-foot" notation on Chesson's page with the AN-73 must be
> incorrect.
> 
> Mike / KK5F
> 

Robert & Susan Downs - Houston
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