Those amps have had a lot of poor contact socket problems and Id
take the cover off and watch the filaments and see if they are instantly on
and stay
on.
The HV is monitored on the meter and should be about 1700V no load and drop
about 200V under load.
If the PO has monkeyed around with the transformer buck/boost wiring the HV
may be in excess of the
1800V cap ratings as well as excessive filament voltage.
Depending upon its production date there are several things attached to the
socket that might have a problem.
Its better to call a tech at Ameritron than waste time on JI's site.
Carl
KM1H
--------------------------------------------------
From: <qrv@kd4e.com>
Sent: Thursday, January 22, 2015 10:06 PM
To: <amps@contesting.com>
Subject: [Amps] 5 Minutes for Ameritron 811H to warm up?
Remember me asking about multi-tube amps?
Well, a local Ham has a brother who likes to buy, try,
& sell Ham gear and he just happened to have an Ameritron
811H in need of a new home.
His asking price was very reasonable because it takes
5 minutes to warm up and he doesn't know why and doesn't
want to fuss with it.
Should I suspect the caps first?
(He's including an extra set of caps.)
I'll get it Valentine's Day weekend but am reading up
starting here:
http://www.w8ji.com/al811h_schematic.htm .
--
*David*
~KD4E~
Nevils, Georgia USA
Safe & Secure Search Engine: duckduckgo.com
Android for Hams: groups.yahoo.com/group/hamdroid
Creative Tech: groups.yahoo.com/group/ham-macguyver
Raspi Alternative: groups.yahoo.com/group/beagleboneblack/
Restored to design-spec at Heaven's gate 1Cor15:22
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5645 / Virus Database: 4273/8982 - Release Date: 01/23/15
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|