Buying 3-500s

[Army Curtis]

Hi Dave,

I just placed an order for a matched pair of 3-500ZG's from RF Parts. They
are Chinese tubes, rebranded by RF Parts. They are much less expensive than
trying to buy a pair of NOS Eimac's or Amperex, and they are warranted by RF
Parts for 2 years. Now, I have not yet received them or tried them out, but
I went through much the same dilemma you are now facing. Hopefully I made a
good choice.

73,

Army Curtis - AE5P
Nacogdoches, the oldest town in Texas

-----Original Message-----
From: Heathkit Owners and Collectors List [mailto:HEATH at LISTSERV.TEMPE.GOV]
On Behalf Of Dave Leisman
Sent: Thursday, April 21, 2005 2:05 PM
To: HEATH at LISTSERV.TEMPE.GOV
Subject: [HEATH-TEMPE] Buying 3-500s

I need some advice in the purchase of new 3-500 for my amplifier.  It's 
not an SB-220 but it's very similar and I'm sure guys with SB-220's 
will have the same question.

How do I select a pari of 3-500's for the ol' girl when there are so  
many makes to choose from?  I know that Eimac is the standard, no 
question, but there are lots of Chineese tubes, and Russian tubes, and 
quite honestly I know there are lots of variation even within those.  
So how do I pick a good reliable pair without throwing away my money?

Also, what does it mean to buy a "matched pair"?  

I don't mean to sound stupid here but I am relatively new to purchasing 
the high end power tubes.  Any help would be appreciated.

Dave, W8QW



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