| Brand | PENTA LABS |
|---|
Check the listing for details. PENTA LABS 4-125A. Condition: New. Listed at 89.99 USD. The 4-125A or 4D21 is a 125 watt dissipation tetrode. The second example is an Eimac that has straight sides and is slightly shorter. The third example is an Eimac but has no base insulation and straight sides similar to the RCA example.
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