[Hammarlund] SP-600/Black Beauties/Transitional Piece?

[rbethman]

Joe,

This particular one may have had the cans changed during its past.  
There really is no telling.

It is good that you checked!

Bob - N0DGN

On 3/8/2012 9:18 AM, Joe Connor wrote:
> I'm currently working on an SP-600 JX-17 serial number 17,2XX. Under the chassis, it has all ceramic-disk caps that appear to be factory-installed. I breathed a sigh of relief because that will save me a lot of work. According to the literature, Hammarlund converted to ceramic disks at around serial number 17,5xx. I figured I had lucked out.
>   
> As I went into the IF cans to make sure the resistors were within spec, I was surprised to find that both 455khz IF cans had black beauties. They were, of course, leaking badly. The 3,955khz IF can had ceramic disks. I opened the T-9 can and looked into the RF deck with a flashlight and saw all ceramic disks. It was strange that only these two IF can had black beauties. Maybe Hammarlund was simply using parts that it had on hand?
>   
> The morale of the story seems to be this: even if you have a set that appears to have all original ceramic disks, it's a good idea to peak into the hidden areas to make sure that a black beauty or two aren't lurking about.
>   
>   
>                                     Joe Connor
>