[Amps] 8650AS Grounded Grid

[Roger (K8RI)]

On 3/25/2013 4:52 PM, Glen Zook wrote:
> The cooler on the GI-7b and GI-7bT come off easily.  A metal cooling
> block could also be made that corresponds with the size of the one on
> the 8873.  Just don't fool around with the BeO2 block!  The block is
> perfectly safe unless one tries to file, sand, etc.
> Glen, K9STH
>
> Website: http://k9sth.com
> ------------------------------------------------------------------------
> *From:* Roger (K8RI) <k8ri at rogerhalstead.com>
> *To:* amps at contesting.com
> *Sent:* Monday, March 25, 2013 3:14 PM
> *Subject:* Re: [Amps] 8650AS Grounded Grid
>
> On 3/25/2013 11:21 AM, Glen Zook wrote:
>  > The 8560A is basically a 4CX250B with conduction cooling rather than
> air cooling.  Therefore, I would look at the various circuits for the
> 4CX250B.
>
> If you have the BeO2 block, it's easy to machine a solid anode block to
> match for the GI-7B

I should have made that clear and didn't think about it until after I 
hit send.  BeO2 dust is hazardous to your health is an understatement. 
Just a tiny amount of the stuff can be fatal.

Actually if you can ge hold of some of the finned cooler for the latest 
version of the GI-7B (makes it look kinda like the 3CX400) they fit 
right on the GI-7B and make it good for about 400 watts.

I'd think with all the cobbled conversions, some one would make a solid 
anode cooler like this and the man thing would be to change the socket 
for a real neat looking conversion.

73

Roger (K8RI)


>