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Re: [Amps] 8875

Subject: Re: [Amps] 8875
From: "Roger (K8RI)" <>
Date: Thu, 26 Mar 2015 01:20:49 -0400
List-post: <">>
Doesn't the 8875 use a transverse air flow? If so, how do you get proper cooling with the 3CX-800 ?
The electrical part is simple, but mechanically?


Roger (K8RI)

On 3/19/2015 8:46 PM, Carl wrote:
A single 3CX800A7 or the 3CPX version is an easier conversion since none of the extreme metal hacking for Russian tubes is needed; the socket and pin outs are identical. Plus the tube is much cleaner for IMD and full to 80% output (at 46 mHz) medical pulls are still fairly easy to find.


----- Original Message ----- From: "Glen Zook via Amps" <>
To: "Juan Pablo Ravinale" <>; <>
Sent: Wednesday, March 18, 2015 4:03 PM
Subject: Re: [Amps] 8875

Go with the GI-7bT variant if you can obtain them instead of the regular GI-7b. You also might consider a single GS-31b. That tube has a plate dissipation of 1000-watts instead of 700-watts which a pair of GI-7b or GI-7bT tubes have. Glen, K9STH

     From: Juan Pablo Ravinale <>
Sent: Tuesday, March 17, 2015 6:18 AM
Subject: [Amps] 8875

Dear OM`s:

I have an old Dentron, and I need to buy two 8875. Can anybody help me with
this? If not possible, a pair of GI7B is a good choice?

Thank you in advance.

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