Thread Number: 93072  /  Tag: Other Home Products or Autos
Fusing Mag. Concert Grand 		[Down to Last]

automaticwasher.org's exclusive eBay Watch:
scroll >>> for more items --- [As an eBay Partner, eBay may compensate automaticwasher.org if you make a purchase using any link to eBay on this page]
Post# 1176951   4/2/2023 at 21:27 (382 days old) by Ladyk (Tacoma)        

I have a Magnavox Concert Grand from 1960. Recapped it and replaced electrolytics and out of range resistors. But I haven't fused it yet. I need help figuring out what sizes, and where to place. It has the Phantom remote and FM multiplexer. Great unit I bought for $20 at a thrift store in '96. I never knew quite how cool it is until not so many years ago. Any help is very much appreciated! 😁




Post# 1176952 , Reply# 1   4/2/2023 at 21:36 (382 days old) by luxflairguy (Wilmington NC)        

What are you talking about? Don't understand

Post# 1176955 , Reply# 2   4/2/2023 at 22:11 (382 days old) by DADoES (TX, U.S. of A.)        

dadoes's profile picture
 
Console stereo/radio.

Post# 1176959 , Reply# 3   4/2/2023 at 22:37 (382 days old) by Ladyk (Tacoma)        

The CG has 6 chassis and 44 tubes but no factory fuses were installed back in 1960. So there is no protection. So I'm needing to add fuses where appropriate. To be honest, I'm a parts changer. I've had mostly success in just replacing the most likely bad parts. I learned how to discharge caps, and read values, but I'm not expert in reading schematics. (I can with time and patience lol). Don't want a catastrophic failure. 😩

Post# 1177008 , Reply# 4   4/3/2023 at 13:22 (381 days old) by cfz2882 (Belle Fourche,SD)        

I'say try a main fuse of 3a for the whole unit,2a for the amp transformer,1/2 amp for any small transformers and see how that goes :) how many output watts is this supposed to have?

Post# 1177038 , Reply# 5   4/3/2023 at 17:50 (381 days old) by delco1946 (Oregon)        

This is my dream console...but my house is full of radios and phonos that I think that ship sailed. I don't really hear of people fusing antique stereos, and I've never had any issues after replacing the caps.

This is no normal set - only doctors and the wealthy could have afforded these in the late 50s. The most basic radio had 5 tubes, ~9X% of record/radio combos would have 6-11 depending on quality. Concert grands had 40+ (unparalleled) and could heat a room lol.

Current inrush will be highest immediately after turning on the set when the caps have no stored charge. If not sized correctly I imagine the fuse might trip during warm up. If youre going to the trouble to fuse it you might want to look into other things too such as a voltage regulator depending on your power supply. Most sets where designed for 115-117 VAC and some utilities provide closer to 125-130 VAC these days resulting in sets running "hot" which can stress a components depending on factors. That being said, i've not had any issues after re-capping - the electrolytes being the most critical. in the 30 and 40s some sets had "death" caps. If this set has those (my death cap experience has been with 1940s philcos) i would replace with special caps that fail open rather than shorting, otherwise you probably dont have much to worry about.

I would ask this question at Antique Radio Forum as a misstep could cause damage to an irreplaceable set. Lots of antique radio and record player knowledge there.

Post# 1177039 , Reply# 6   4/3/2023 at 17:55 (381 days old) by delco1946 (Oregon)        

Can't edit...but as a "take away", i wouldn't honestly bother to fuse but whatever helps you sleep at night :). If you do fuse, ive only heard of a single fuse at the plug/before the power transformer....IMO less is more - ive had great success mucking things up by going overboard but once again ask on the radio forum.

Post# 1177046 , Reply# 7   4/3/2023 at 21:18 (381 days old) by Ladyk (Tacoma)        

I agree that sometimes less is better. I may get an Elmenco fused plug. It has a fuse on both sides. Hard to find but I see them in eBay, as well as electric fence supply websites.

This will certainly heat a room! The phono compartment would feel like an oven after a couple hours playing. Probably why it went through two idler wheels in 15 years. I fixed that problem. Went to the computer shop and bought 3 12x fans with a power supply. I installed one for each amo, and one for the tuner. I managed to install them on the back without altering it, other than some new studs and spacers to extend the back slightly. Runs cool if left on all day now!

  Photos...       <              >      Photo 1 of 7         View Full Size
Post# 1177047 , Reply# 8   4/3/2023 at 21:26 (381 days old) by Ladyk (Tacoma)        

I agree that sometimes less is better. I may get an Elmenco fused plug. It has a fuse on both sides. Hard to find but I see them on eBay, as well as electric fence supply websites.

This will certainly heat a room! The phono compartment would feel like an oven after a couple hours playing. Probably why it went through two idler wheels in 15 years. I fixed that problem. Went to the computer shop and bought 3 12v fans with a power supply. I installed one for each amp, and one for the tuner. I managed to install them on the back without altering it, other than some new studs and spacers to extend the back slightly. Runs cool if left on all day now!

  Photos...       <              >      Photo 1 of 7         View Full Size
Forum Index:       Other Forums:                      


Comes to the Rescue!

The Discuss-o-Mat has stopped, buzzer is sounding!!!
If you would like to reply to this thread please log-in...

Discuss-O-MAT Log-In



New Members Click Here To Sign Up.



                     

automaticwasher.org home
Discuss-o-Mat Forums
Vintage Brochures, Service and Owners Manuals
Fun Vintage Washer Ephemera
See It Wash!
Video Downloads
 Audio Downloads
Picture of the Day
Patent of the Day
Photos of our Collections
The Old Aberdeen Farm
Vintage Service Manuals 		Vintage washer/dryer/dishwasher to sell?
Technical/service questions?
Looking for Parts?
Website related questions?
Digital Millennium Copyright Act Policy
Our Privacy Policy