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[AMPS] 3-500Z by Pro-tek

To: <>
Subject: [AMPS] 3-500Z by Pro-tek
From: (Bill Turner)
Date: Tue, 3 Jul 2001 15:27:39 -0700
I bought one Chinese-made tube from RF Parts.  They check each tube
individually when they receive it and they guarantee them.  Mine has
been fine so far.  Some Chinese brands are no good, but RF Parts
claims they know which ones are good.
73, Bill W7TI

----- Original Message -----
From: "Marcel Jorba" <>
To: <>
Sent: Tuesday, July 03, 2001 12:13 PM
Subject: [AMPS] 3-500Z by Pro-tek

> Hi,
> I need to replace three 3-500Z (or 3-500ZG) tubes. I have been
surfing the web an I have find 2 nice alternatives:
> 1.- Buy to RF parts their chinese tubes
> 2.- Buy to dandcelectronics the 3-500Z the resell. They offer a nice
price for these Pro-Tek tubes but I don't have any idea about these
tubes. Anyone has any experience or
>      reference?

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