I don't, Bob, but I'm not going to rush into buying the replacements until I
can get them tested..
Good advice and thanks!
-Original Message-
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of bob mccully
Sent: Thursday, February 19, 2009 6:23 PM
Thanks for that, John...
I'll quench the impulsive urges and think about it awhile...hihi
John
WB5CW
-Original Message-
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of John
Sent: Thursday, February 19, 2009 5:32 PM
To: AMRadio@mailman.qth.net
S
John, Do you have a tube tester? I'd try testing them before replacing them
all.Bob AB8OP
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"I'm going
to be tempted to bite on the Ebay ads that just replace all tubes"
Kind of overkill before any additional problem solving is done. Might be
interesting to at least see if there's AC on the secondary of the power
tranny. Then skip to see if there's DC on the output of the filter ca
Great info Jim... thanks so much. I'll give it a try.
John
WB5CW
_
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of Jim Wilhite
Sent: Thursday, February 19, 2009 3:25 PM
To: Discussion of AM Radio in the Amateur Service
Subject: Re: [AMRadio]
It takes right at 90 volts for that rectifier to conduct. When it starts
conducting the caps will start forming. If you are going to form the caps in
this fashion, I would pull all other tubes and put the variac at 90 volts.
wait about 5 mins and raise it to 100 volts. Put your finger on th
Hi Brian The specs show the 75A2 drawing appx 85 watts Thats less than 1
amp at 115 volts. Bill K5PML
--- On Thu, 2/19/09, WA5AM wrote:
From: WA5AM
Subject: [AMRadio] 75A-2 power consumption
To: "Discussion of AM Radio in the Amateur Service"
Date: Thursday, February 19, 2009, 2:08
This shows 85W +/-
http://www.collinsmuseum.com/75a2.html
K7DFW
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List Rules (must read!): h
I've got it on again... at about 75v...
How long would you leave it before you romp it up to 90-95?
J
_
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of WA5AM
Sent: Thursday, February 19, 2009 1:18 PM
To: Discussion of AM Radio in the Amateur S
On Thu, Feb 19, 2009 at 3:11 PM, John Carrington, M.D. <
jm...@charterinternet.com> wrote:
> I'm wondering if I don't see any filament glow with that tube... I'm
> going to be tempted to bite on the Ebay ads that just replace all tubes...
> the set for this receiver is 69 bucks.
>
It's real har
I'm wondering if I don't see any filament glow with that tube... I'm going
to be tempted to bite on the Ebay ads that just replace all tubes... the
set for this receiver is 69 bucks.
_
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of WA5AM
Sent:
On Thu, Feb 19, 2009 at 2:51 PM, Todd, KA1KAQ wrote:
> I thought it was closer to 90v to fire that tube, Brian - maybe I'm
> mistaken. I'd run it up at least to there, if the tube is dead, it
> won't conduct so it matter.
>
> ~ Todd, KA1KAQ/4
>
Could be Todd. The one graph I found appeared to
Don't forget about the AWA AM QSO party this weekend! CU there!
-Larry/NE1S
- Original Message -
From: "" >;w1...@att.net
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Our Main Website: http://www.amfone.net
AMRadio mailing list
Searchable Archives: http://www.mail-
I thought it was closer to 90v to fire that tube, Brian - maybe I'm
mistaken. I'd run it up at least to there, if the tube is dead, it
won't conduct so it matter.
~ Todd, KA1KAQ/4
On Thu, Feb 19, 2009 at 3:08 PM, WA5AM wrote:
> Hi All,
>
> I have a friend in Oregon that I'm trying to help via e
Yep... that tube socket says 5y3gt...
I plugged in a small variac, 7.5amp... and the ammeter just barely budged on
the 2amp scale maybe it's not working...
_
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of WA5AM
Sent: Thursday, February 19,
Thanks, Brian...
_
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of WA5AM
Sent: Thursday, February 19, 2009 12:08 PM
To: Discussion of AM Radio in the Amateur Service
Subject: [AMRadio] 75A-2 power consumption
Hi All,
I have a friend in Oreg
Hi All,
I have a friend in Oregon that I'm trying to help via email, who is bringing
his A2 up slowly with a variac, after being stored for about 12+ years.
Anyone know what he should expect to see in regard to current draw on the AC
ammeter built on the Variac? He is at 75 volts now with very li
Not true. You can search the CQ Magazine archives from 2007 back to 1945.
Go here:
http://hamcall.net/cqcgi
Look for the box that has in it "Search full text of CQ Archives"
Pete, wa2cwa
On Thu, 19 Feb 2009 10:54:11 -0500 "tvic...@attglobal.net"
writes:
. The
> on-line
> CQ magazine index only
Folks,
This is a long shot but here goes-
I am requesting help on finding the article for a homebrew 2m or 6m AM
transmitter I started in the 1960s. The article appeared in CQ or 73 or a
similar publication (but not in QST) before 1969. When I was a teenage
ham, I finished the modulator portion o
Folks,
This is a long shot but here goes-
I am requesting help on finding the article for a homebrew 2m or 6m AM
transmitter I started in the 1960s. The article appeared in CQ or 73 or a
similar publication (but not in QST) before 1969. When I was a teenage
ham, I finished the modulator portion o
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