[ForSale-Swap] Hamfest Finds

[n2lxm at juno.com]

Greetings All,


 Well some more Hamfest finds have followed me home. The first is a
McMurdo Silver Company  Wave Meter. Model 903 (tuning Unit) and model
903A (indicator unit). This little gem tunes from 1.8 Mcs to 500 Mcs in
seven bands (supplied by seven plug in coils). I could not really find
anything it doing a web Search, but from looking at old ARRL Handbooks it
seems this company was around right after WWII.

 The second gem appears to be a prototype SSB adapter. It looks like it
could have been built in the R & D labs at Fort Monmouth. It has a
Collins Radio PTO, type 70J-1, symbol type Z-502. I took some time with
it today and ran it up on a Variable AC Supply. Of course all the Filter
caps were bad, so I jumped in some new ones, and hooked it to the IF
output from My R-390A/URR. The last thing to do was hook up an audio
amplifier to the line output.  Well it may not be the best SSB detector I
have seen, but it did work. After some fooling around, cleaning controls
and such it settled down and worked O.K.

 Can anyone help in finding any information on the wave meter and where
can find information on the Collins PTO? And also what was the
Nomenclature for the Militaries SSB Adapter used with the R-390
Receivers. Any help would be greatly appreciated. 

                                         Jeff N2LXM
                                          American
                                            Patriot
                                Amateur Radio Operator
                         Proud Father of Two U.S. Marines