HO-10

[mike bryce]

start by poking around the vertical input amplifier... could be picking up
stray ac.

the input amplifier could even be oscillating! you might need to couple a
second scope to the input grid of the amp to see what's there.


Mike Bryce WB8VGE
SunLight Energy Systems

http://www.seslogic.com
http://www.theheathkitshop.com

"Electricity at the speed of light"

> From: Milan Bagel <Milanbagel at CS.COM>
> Reply-To: Milanbagel at CS.COM
> Date: Wed, 18 Dec 2002 10:27:09 EST
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: HO-10
>
> Hello Experts!
>
> I have restored a lot of HO-10 monitors but this one has me stumped...  The
> sweep pattern using sine function seems to have some signal (or?) on it
> rather than being a straight line.  I thought it might be AC ripple but have
> replaced all of the usual HV components.  The sweep picture looks like little
> "ocean waves" Hi Hi.  Any thoughts out there?
>
> Tnx and 73,  Milan  K9HDX
>
> -----------------------------------------------------------
> This list is a public service of the City of Tempe, Arizona
> -----------------------------------------------------------
>
> Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
> To post - HEATH at LISTSERV.TEMPE.GOV
> Archives - http://interactive.tempe.gov/archives/HEATH.html
>

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html