[Hammarlund] SP600 ReCap BBODs

[Richard Knoppow]

----- Original Message ----- 
From: "Mike Cornell" <njmikec at hotmail.com>
To: <hro5-2 at cox.net>; <hammarlund at mailman.qth.net>
Cc: <k5apl at yahoo.com>
Sent: Tuesday, January 29, 2013 9:49 AM
Subject: Re: [Hammarlund] SP600 ReCap BBODs


>
> If it's not a restuffing job (wax capacitors) which these 
> aren't, then I would clip the leads near the cap and go 
> the 'tiny coils' route.
>
> I wind the tiny coils on a piece of stiff wire, dip them 
> in flux, and solder away.
>
> Going all the way to the lug, desoldering it, unwrapping 
> the old cap lead, etc., etc., will (IMHO) make for a very 
> long job.
>
> Good luck in the turret!

     A warning about the turret. In order to replace the 
capacitors in the RF deck its necessary to remove it. The 
main warning is to absolutely sure you have the bandswitch 
positions _between_ bands, it doesn't matter which. If you 
leave it on a band the contacts on the deck will be 
destroyed.  I am sorry to say I know this from experience. 
Set the bandswitch mid-way when removing and replacing the 
deck.
     The heavy ground leads to the tuning capacitor are best 
removed with a soldering gun. This has the heat capacity 
along with being small enough to get to the terminals. Small 
soldering irons do not have enough heat capacity and old 
style irons will ar too big to reach.
     There is one cap in the IF can at the side of the 
tuning unit. There are also a couple of caps in the fixed 
frequency oscillator box. There have been some articles on 
how to get it open, its a bit of a Chinese puzzle.
     You have at least the consolation that once done you 
will never have to do it again.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com