[Boatanchors] 51J-4 question

[Bob Wilder]

Go for it.  Have used 51J-4s and R-388 and found the R-388s better.  Used 
the R-388 at a SSB radio site at Pepperrell AFB much better than a stock 51J4


At 09:38 PM 5/12/2005 -0700, telegrapher at att.net wrote:

>I recently picked up a Collins 51J-4 from a friend to use and decide if
>i want to buy it or not.
>
>First of all, it's not a true 51J-4 per my friend.  He said it's an
>R-388 that was upgraded by the Air Force to 51J-4 specs.  They added a
>product detector on the right side, mounted on a bracket to the support
>panel that goes from the front panel to the chassis.  I don't know what
>other changes might have been incorporated but it also has 3 filters,
>.5, 3.0 and 6.0 Kc.
>
>The chassis is marked with the tube V and type numbers.  The IF tubes
>are 6BE6.  I would not have expected that to be the correct tube but
>that's what is marked on the chassis and plugged into the socket.
>
>Not having any 388 information, do these tubes in the IF section sound
>like a 388 or what?  These 3 are pretty flat and of all the boxes of
>tubes i have, i don't have any of these.  Yet!
>
>Thoughts on the receiver?
>
>Thanks
>
>Larry
>W0OGH
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Bob & Carole Wilder
6032 Idlemoore Court
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