[R-390] SP-600 Recap

[Joe Connor]

1.  For those not familiar with them, Al Parker's accounts of his restoration of various receivers, including SP-600s, make fascinating reading.

http://www.boatanchors.org/

2. Chuck Rippel's DVD on restoring SP-600s is the best. It sure walked me through my first SP-600. That DVD is well worth the money.

                          Joe Connor





>________________________________
> From: Al Parker <anchor at ec.rr.com>
>To: kirklandb at sympatico.ca 
>Cc: chuck.rippel at cox.net; r-390 at mailman.qth.net 
>Sent: Thursday, December 20, 2012 1:59 PM
>Subject: Re: [R-390] SP-600 Recap
> 
>Hi all,
>    I held my tongue on Tisha's initial post, I didn't think she was talking about removing the rotating turret, but figured I'd wait and see.  Chuck, we've never met, but I hope we will sometime, now that you're back in "circulation".  And, I've never seen your video, tho' have heard lots of good about it.
>    Bill says it right, for me.
>    I have done dozens of SP-600's, but not to the full tear down everything-polish-"restoration" level, I'd rather call my work "refurbishment".  Front panels may be stripped & repainted, side plates, chassis, IF cans, etc. cleaned and maybe buffed, whatever I or the owner wants.  I have never removed the rotating turret, because I could find no reason to do so.  Curved hemostats help on the clips on the removable modules.
>    The RF deck is the one thing that requires care and attention, as Bill stated, particularly setting the band-change to mid-way between bands. Some of the 27 BBOD's are tough to remove without collateral damage. Hakko is my friend there.
>73,
>
>Al, W8UT
>www.boatanchors.org
>www.hammarlund.info
>
>"There is nothing -- absolutely nothing -- half so much
>worth doing as simply messing about in boats"
>Ratty, to Mole
>
>On 12/20/2012 1:28 PM, kirklandb at sympatico.ca wrote:
>> 
>> The turret assembly is quite easy. Drop the bottom plate and you can pull off the individual segments.
>>   the spring clips are a little tricky though.
>> 
>> The RF deck, i.e. the side of the RF assembly with the tubes in it is another matter.
>> 
>> A 45 watt iron really helps, as does the hakko desoldering gun + dental picks.
>> 
>> When putting the RF deck back in place, as I recall you want the turret section about 1/2 way
>>   between bands so that the fingers do NOT engage the pins.
>> 
>> Yes I have broken a finger.
>> 
>> The caps in the RF section are all 0.01uf.
>> 
>> IF cans have 0.022 and some of the bottom.
>> If they are BBODs keep the 0.022 and sell them to the Audio folks for $15 or more (assuming they are decent).
>> 
>> nate.html
>>                           
>> ______________________________________________________________
>On 12/20/2012 12:59 PM, chuck.rippel at cox.net wrote:> Watch the Video before attempting,  Watch the Video before attempting,
>> Watch the Video before attempting, Watch the Video before attempting,
>> Watch the Video before attempting, Watch the Video before attempting !!!!
>> 
>> Tisha is >absolutely right<, removing the rotating turret from an SP-600
>> has almost zero room for error.  Add to that, replacing the capacitors
>> has zero room for error.  You'll be doing something like.... 27 or so
>> total.  You can't do 5, put the turret back, reconnect the 455 KC IF
>> wires on the side, test your work and keep repeating till the caps are
>> done.  Every time you remove the turret, the chances of something
>> breaking increase by an order of magnitude.  Break off one of the
>> "fingers," the entire band is done.
>> 
>> The capacitor replacements must be accomplished in a single, proper
>> removal of the turrett.   You'll want to use all 1KV ceramic disc
>> capacitors in the turrett.  As I recall, they are all .01ufd.
>> 
>> 
>> ---
>> No  trees were killed to deliver this message.  However, a large number
>> of electrons were terribly inconvenienced.
>> 
>> Chuck Rippel
>______________________________________________________________
>R-390 mailing list
>Home: http://mailman.qth.net/mailman/listinfo/r-390
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:R-390 at mailman.qth.net
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>
>
>