Re: HV Power Supply - 7704A - Neon Bulbs


Hi Mark,

I was just about to post that the older manual shows a 5AB-T for those. I plan to replace all four in that board (along with the caps). I have a box of A9A leaded bulbs but, unfortunately, those are the wrong striking voltage for this application. So close...

Barry - N4BUQ

----- Original Message -----
From: "Mark Vincent" <>
To: "tekscopes" <>
Sent: Monday, October 4, 2021 9:02:51 PM
Subject: Re: [TekScopes] HV Power Supply - 7704A - Neon Bulbs

A 5AB is a direct replacement for a NE23. Mouser has these in stock. Get several
to have spares on hand. Broken leads at the base of neons is common.


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