Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
I just finished a recap on my Montgomery Ward/Airline 94-BR1534A. It now works great on AM and FM. My only issue is a slight buzz from the power transformer. It doesn't effect the sound from the radio, but at very low volume I can still hear it. The transformer gets warm but not hot. Most of the radios I work on are AC/DC so I'm not sure if I have a problem or not.
http://www.nostalgiaair.org/Resources/979/M0011979.htm
Thanks,
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
(This post was last modified: 01-24-2016, 03:26 PM by Eric Adams.)
Posts: 4,739
Threads: 52
Joined: Sep 2008
City: Sandwick, BC, CA
(01-22-2016, 03:39 AM)Eric Adams Wrote: I just finished a recap on my Montgomery Ward/Airline 94-BR1534A. It now works great on AM and FM. My only issue is a slight buzz from the power transformer. It doesn't effect the sound from the radio, but at very low volume I can still hear it. The transformer gets warm but not hot. Most of the radios I work on are AC/DC so I'm not sure if I have a problem or not.
http://www.nostalgiaair.org/Resources/979/M0011979.htm
Thanks,
Eric;
I have an Italian radio that does the same thing, only much more severely, in it's case it really needs to be dipped in varnish as the core is loose, in other cases it could be loose laminations, a loose bell, or something as simple as a loose bolt.
Regards
Arran
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
So, is it something that I should go after or leave it alone?
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 1,524
Threads: 240
Joined: Sep 2012
City: West Bend, Wisconsin
I wish all I had was a slight buzz....on the radio I worked on one of these for a friend and not one but ALL of the IF cans suffered from silver mica disease. Then I kept getting interference just from putting the aluminum cans back over the coils. It was a beast and I could never get the FM band to receive many stations. Now this has nothing to do with your question, other than saying if you have yours playing good, I applaud you!
Greg V.
West Bend, WI
Member WARCI.org
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
I know what you mean, Greg. After I got mine done, the SMD started on AM only. I rebuilt one of the IF cans. This morning it is back! (not as bad) Still on AM only. Now I'm going to rebuild the other IF can. FM still sounds great.
BTW I tightened down the power Transformer and the buzz has quieted down
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 4,390
Threads: 412
Joined: Jun 2011
City: Boston
State, Province, Country: Massachusetts
Rtaher than the rebuilds has anyone ever tried NOS IF units? I know a fellow who had quite a few as he bot out a Radio?TV repair shop that closed. He put one in an Air King set for me and it works very well, I think most of his stock on these was post WW2 types, probably pretty generic.
Sometimes a little hum with good sensitivity and reception is not too big an issue. Enjoy your handiwork Eric.
Paul
Tubetalk1
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
Hi Paul,
I actually enjoy rebuilding IFs and I'm getting good at it. You're right about the buzz. It is very slight and the radio sounds great.
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 4,390
Threads: 412
Joined: Jun 2011
City: Boston
State, Province, Country: Massachusetts
If you like re builds for IF trans I will be your friend, can I send you radios! Ross did a very informative class on this for our club last fall.
Paul
Tubetalk1
Posts: 15,974
Threads: 557
Joined: Oct 2011
City: Jackson, NJ
My 70 has the buzz. I tried anything, tightening and such...no luck. But it plays just fine.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
I found an easy fix! I had a junk chassis with a good transformer-swapped it and no noise. I wish all repairs were this easy!
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 15,974
Threads: 557
Joined: Oct 2011
City: Jackson, NJ
Especially with humans. I read, a Russian software engineer got his head transplanted to some other guy's body.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 5,104
Threads: 270
Joined: Nov 2012
City: Wilsonville
State, Province, Country: OR
Quote:Especially with humans. I read, a Russian software engineer got his head transplanted to some other guy's body.
well that probably fixed both guys...
Users browsing this thread: 1 Guest(s)
|
Recent Posts
|
the worlds largest CRT Television,, not philco - KX45ED1
|
i still have my Sony Trinitron TV. Didn't have the heart to toss it. My first new color TV. Bought it at Wiz. $200. In 1...morzh — 08:56 PM |
the worlds largest CRT Television,, not philco - KX45ED1
|
I saw that on YouTube just this week! What an incredibly massive CRT, and what luck that it was discovered and saved.jrblasde — 08:19 PM |
the worlds largest CRT Television,, not philco - KX45ED1
|
the worlds largest CRT Television,, not philco - KX45ED1
sorry this is not philco so if its in the wrong location,, ei...jcassity — 07:25 PM |
Custom Hammond Power Transformer
|
Another trick I learned of to remove any of the thick crusty rust that our little rodent friends tend to leave on a radi...Arran — 05:31 PM |
Custom Hammond Power Transformer
|
I suggest stripping all electronics, including sockets, from the chassis. That way you have a completely free hand to us...DaleHCook — 04:19 PM |
Custom Hammond Power Transformer
|
I do already have an isolation transformer. I got that before aligning my 49-906 since it’s an AC/DC set. I didn’t dare ...jrblasde — 04:10 PM |
Custom Hammond Power Transformer
|
Very nice work on that transformer! Now you can move on to the next steps. +1 on not using the dimmer control. They do i...TV MAN — 04:02 PM |
Philco 70 antenna lead
|
I see in that picture that the power cord is held next to the chassis with the clip that in mine holds the antenna lead....Jim Dutridge — 03:55 PM |
Dynaco PAT 4
|
I am starting to hear a small amount of 120hz filter hum, which I didn't hear in my headphones, so it's time to address ...TV MAN — 03:47 PM |
Philco 70 antenna lead
|
Jim
If you mean the wire going from the Volume pot to the back, here
It does not seem to run ovefr those. Quite t...morzh — 02:21 PM |
Who's Online
|
There are currently 1436 online users. [Complete List] » 4 Member(s) | 1432 Guest(s)
|
|
|
|