RE: Amplifone HV

Checked the BU406D (ignore BU409D in my previous post, I meant 406) and
output is fine. Checked the +/- 24 and I've got problems on both boards at
the 7924, so I've got a couple on order.

Also, I compared all my results on the non-working SW boards w/ my working
MH. I noticed that the -24 on the MH is around -18 -- a little low, don't
you think? The visual output appears normal (although I do get some sigmoid
bowing on the triangle tunnel at the beginning, and when using the MH boards
in my SW, I do get blooming in the Death Star explosion sequence)...
Thoughts on this?

I'll let you know what success/failure I have after replacing the 7924's.

Thanks

> -----Original Message-----
> From: owner-vectorlist@synthcom.com
> [mailto:owner-vectorlist@synthcom.com]On Behalf Of MKDUD@aol.com
> Sent: Monday, October 15, 2001 1:31 PM
> To: vectorlist@synthcom.com
> Subject: Re: VECTOR: Amplifone HV
>
>
> In a message dated 10/14/2001 9:59:54 PM Eastern Daylight Time,
> bret@infowest.com writes:
>
> << I'm trying to nail down some problems w/ two Amplifone HV boards and 5
> deflection boards. I've started by trying to diagnose the HV boards.
>
> On one HV board, I've recapped and installed a new BU409D (previous owner
> had installed a BU409!). The other I haven't touched yet. >>
>
> Installing a transistor without a dampener diode can really
> kill your
> HVT, but according to your rings on the tester, the WinTrons seem
> OK. Are you
> getting a square waveform at the base of where the BU406D (or
> BU409D) goes??
> Do you have a scope? How is your +/- 24v? Have you recapped anything yet?
> ------------------------------------------------------------------
> ---------
> ** To UNSUBSCRIBE from vectorlist, send a message with
> "UNSUBSCRIBE" in the
> ** message body to vectorlist-request@synthcom.com. Please direct other
> ** questions, comments, or problems to neil@synthcom.com.
>

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Tue Oct 16 12:43:30 2001