[Amps] GS-31b / GS-35b NOT Interchangeable

[Bryan Swadener]

Thanks Carey,

That's good to know, before throwing money away on a spare that won't fit my heatsink.  The previously posted misinformation has been spread on other forums and should be corrected.

I'm working on building a GS-35b 160m amplifier into a Heath SB-220 cabinet.  It's my "SB-160" project.  I'm slowly getting closer.  I have the plate xfmr rewound (http://www.tinyurl.com/big-xfmr).  The transformer should run 3KW input all day with power to spare.  I have plenty of cooling airflow available as well... 120cfm @ 0.4" SP.

73,
Bryan WA7PRC
 
On Wed, 18 May 2011, Carey KC5GTT wrote:
> there is a little more difference than that. the heatsink
> on the gs35 is a 
> wedge fit with a washer and a nut. while the gs-31 simply
> has a stud and a 
> nut. but from there down the are identical. it would be
> handy if the coolers 
> would iterchange.
> 
> Carey, KC5GTT
> 
> 
> > The GS-31b and the GS-35b are the same tube except for
> the heat sink which 
> > "screws" on.  You can remove the heat sink from
> the GS-35b and put it on 
> > the GS-31b and then the GS-31b will have 1500 watts
> dissipation instead of 
> > 1000 watts.