[R-390] AN/UPM-6B Radar Test Set

[ELDIM at att.net]

Hello Chuck and Crew,
What we have here is a vintage RADAR TEST SET for primarily Testing the RADAR IFF/SIF of the APX-6 Transponder which was used in Aircraft as well as Ground Radar Equipment.  The basic AN/UMP-6 was spelled out in the T-39 Aircaft Manual (1T-39A-2-1).  I believe we had this Test Set at our SAC Radar Bomb Scoring Site at JOPLIN BOMB PLOT back in the 60's.
Unless you are playing around with RADAR, I would consider this item ONLY Valuable for it's case and hopefully usable parts.  Last Acquisition Cost to the Government was ONLY $1900., which I am almost certain was WAY BACK WHEN perhaps in the 50's and very early 60's. If there is a manual, that would provide great insight to the Date of Acceptance and perhaps manufacturer. Plus a luke a the Tube Compliment can provide you a list of Tubes that it contains.  It is supposed to have a Video Probe which if I am correct would bave a BNC Connector, a Green Probe Body and is Switch-able from X1/X10/X100 and usable up to 2 KV.  The test set is mounted in a case that if I recall was rectangular and about 16" Tall x 14: Wide x 18" Long.  The top may have rolled curvature on the front and rear plus may have been hinged.  I may have one of these in the dark recesses of the ole warehouse, however they are pretty much buried at this time as we are inventoring for the GREAT EXODUS.  My formula for 
deciding price is, to look at the weight, material it is made of, plus most importantly "WHAT CAN I USE IT FOR?" in determining a value.  i.e. If it weighs 50 pounds and has aluminum case and internal construction, I initially price it at at aound 15-25 cents a pound. If it has a manual, then I investigate the value of the tube and accessories.
If it has a Probe I add $5-10 depending on condition.  Normally, I don't buy these for over $25.00 especially sight unseen.  I have a ton of test sets, but ONLY have those pertaining to AIRCRAFT on our Inverntory.  Really Not much demand for RADAR TEST SETS.  The AN/UPM-9B measures from 47 to 4100 PPS, with a Repetetion Rate of 0.7-5.0 USec., it will measure BW, Freq, Pwr, Sensitivity, Coding and Decoding. Hope this info helps. Time to eat a late supper.
73,
Glen Galati, KA7BOJ
Tacoma, Wa
eldim at att.net 

-------------- Original message from KA6UUP <ka6uup at pacbell.net>: -------------- 


> Someone is trying to sell the above. 
> It is clean and unmolested. Operating condx is unknown. 
> This is out of my areas of interest. 
> Can anyone tell me what is a fair price for this or is there any 
> interest in it? 
> Tnx, 
> Chuck 
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