My Henry 3KA had Bristol screws in the pate connectors and all knobs.
On Sun, Mar 4, 2018 at 2:28 PM, Jim W7RY <jimw7ry@gmail.com> wrote:
> Should read just one of many sources.
>
>
>
>
>
> Thanks
> 73
> Jim W7RY
>
>
>
> -----Original Message----- From: Jim W7RY
> Sent: Sunday, March 04, 2018 1:15 PM
> To: Mark Beckwith ; amps@contesting.com
> Subject: Re: [Amps] Plate hardware for Eimac tubes
>
>
> That’s because it’s a spline. Not hex, not torx.
>
> Spline AKA Bristol.
> Just one source:
>
> http://www.americanradiosupply.com/ss-508-bristol-spline-
> key-wrench-9-piece-set/
>
>
> Collins always used them on knobs and set screws.
>
>
>
> Thanks
> 73
> Jim W7RY
>
>
>
>
> -----Original Message----- From: Mark Beckwith
> Sent: Friday, March 02, 2018 7:30 PM
> To: amps@contesting.com
> Subject: [Amps] Plate hardware for Eimac tubes
>
> Hi - having some difficulty here swapping tubes around. Is there a
> standard
> tool/hardware size for the plate caps and heat sinks on top of the Eimac
> tubes (I'm working with 3-500s and 4-400s this evening trying to get an amp
> working). It seems like it must be a Torx T5. Is that right? Is it
> standard? Hex keys don't seem to work, and the set screw heads are so
> small
> I really can't see them well enough to get after it without risking
> damaging
> tool or part. (Also I don't have a Torx T5 and it just seems like that must
> be it but I don't have one to try).
>
> Help? Thanks.
>
> 73 - Mark N5OT
>
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