[Hammarlund] SP-600 IRecapping Finished)

[James A. (Andy) Moorer]

Alignment tools - "all" you need is a standard plastic alignment tool 
with a metal tip that will turn a trimmer capacitor or a slotted 
threaded shaft. One of those plastic tools with the small square of 
sheet metal on the end works as well as anything.

Note that the high band is so twitchy that even putting the tool in the 
hole makes it go crazy. You end up just turning maybe 1/8 turn, then 
taking the tool all the way out to see if it made things better or worse.

BE SURE AND FOLLOW EXACTLY THE ALIGNMENT PROCEDURE FOR L37. That one is 
wacky - it is a very broad peak, but it makes a huge difference in the 
operation of the receiver. The given alignment procedure is the only one 
that comes up with good results.

All the other coils are easy. Crank n' peak n' move on. Be sure and let 
the radio warm up thoroughly before starting. And go easy on the signal 
generator - don't use too strong a signal or you will find peaks everywhere.

On the audio mod, there are no downsides. I don't think it makes much 
difference in the resulting sound, however (imho). There is so much 
distortion in the audio final that it swamps all the other issues. The 
manual is quite proud that they kept the distortion below 10%(!).

-A

-- 
James A. (Andy) Moorer
www.jamminpower.com




On 1/28/2012 2:59 PM, Joe Connor wrote:
>   
> 1. What tool do you use for alignment? The insulated alignment tools I have are sort of crappy.
>   
> 2. Are there any downsides to doing the audio mods set forth in the SP-600 Anthology?
>