Hi Jim,
Cool! I've never seen an Eimac graphite plate 3-500. Thanks for sharing that
info!
73
Stan
KM4HQE
On December 10, 2018 7:32:30 AM CST, Jim <jimw7ry@gmail.com> wrote:
>RF parts is selling "re-branded" Amperex 3-500 tubes which are nothing
>more than Jolita (China made) 3-500s. Just did a picture lookup on
>Google and saw them. They have 5 disks vs the original Amperex 4 disk.
>
>Eimac DID make graphite plate (stacked doghnuts) style 3-500s in the
>60s
>and 70s. They are pretty rare. I had several pairs in very old SB220s
>that I bought at hamfests. They were clearly marked with the Eimac
>label. I don't remember how many disks the Eimac tube had.
>
>
>Thanks
>73
>Jim W7RY
>
>On 12/9/2018 10:10 PM, Stan Gammons wrote:
>> Probably RF parts tubes. The RF parts 3-500ZG tubes in my L-4B have 5
>
>> disc. Seems like the Amperex ones have 4 disc. All of the Eimac
>> plates I've seen were vertical and corrugated shaped. Eimac made some
>
>> great 3-500Z's. Wish they still did... But, I think the tube vs
>solid
>> state amps has been covered before.
>>
>>
>> 73
>>
>> Stan
>> KM4HQE
>>
>>
>> On 12/9/18 11:59 AM, Jim wrote:
>>> Then they are not Eimac.
>>>
>>>
>>>
>>> Thanks
>>> 73
>>> Jim W7RY
>>>
>>> On 12/9/2018 10:42 AM, Paul Baldock wrote:
>>>> At 08:45 PM 12/8/2018, you wrote:
>>>>> Are there serial numbers on the grid mounting disk/cone below the
>>>>> plate?
>>>>
>>>> No
>>>>
>>>> - Paul
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