[Milsurplus] AN/APA-38 Panadaptor

[Michael Hanz]

The AN/APA-38 was more associated with the APR-1 and earlier APR-4 
series, Ray - thought they all worked with the 30MHz output of the 
receivers.  The mate to the APR-4Y was also the AN/ALA-2 (and AN/ALA-10, 
like the one below).  These last two were identical except for the 
addition of a small "look-through" module that allowed seeing through 
momentary gaps in the associated jamming transmitter to see if the enemy 
radar was still pinging.  They all used 400Hz power.

- Mike


On 9/27/2023 3:50 PM, Ray Fantini wrote:
>
> Is doing something completely pointless sane? I was recently so 
> impressed by some of the aircraft radio dioramas at Gilbert that I 
> have decided that I would like to try to attempt one myself. First let 
> me start by saying that one of the tools I use at work almost all the 
> time is a spectrum analyzer, everyone knows that much has been rolled 
> out in the past years from companies like Rigol with a line of 
> spectrum analyzers with internal tracking generators for under one 
> thousand dollars or the little Nano VNA vector network analyzers so 
> today anyone can have a spectrum analyzer or VNA that would have 
> easily cost five or ten grand ten years ago, and brand name analyzers 
> like the HP ESA family and not out of the range of most people, but I 
> want to take a giant leap backwards and build up my EW/ECM warfare 
> “primitive” analyzer by kitting out my APR-4Y with a AN/APA-38 
> panadaptor. The old APR-1 and 4 all worked with a larger display, the 
> APA-10 but never warmed to those old receivers being the 4Y had just 
> one head for covering all four bands and had enough sensitivity to 
> almost be called a receiver along with an added FM demodulator.I have 
> a APR-4Y with head and rack but lack the AN/APA-38 scope and think if 
> I can come up with one that would be the good basis for a complete 
> search receiver from the old days, a primitive spectrum analyzer.
>
> So if anyone has one that can be talked out of please let me know.
>
> Have already seen where a ARC-21 has shown up so there must still be 
> more unicorns out there.
>
> Ray F/KA3EKH
>
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