[OldRestorer]

I have someone wanting me to fix their receiver and tuner. I am not sure how different it is from an early tube set.
I know the tuner is a TX-300 but I know nothing about the record player attachment.

Any thoughts?

Me

[mikethedruid]

Good luck with it. Right off to bat I see you are going to need a head shell and cartridge and needle for the turntable.

[OldRestorer]

And a counter weight and a platter, lol
Why would she buy it like that.....
It is an AR-XA

[Ron Ramirez]

The TX-300 is an amplifer (only); it has no built-in tuner and will require a separate tuner to receive radio signals.

[OldRestorer]

ah ok,
I am hoping this lady is not trying to get sound from it then, lol
Me

[OldRestorer]

Question She said she has the turntable parts but someone said the fuse was blown. I read that the fuses are special..
Can anyone tell me what fuse it is and if I can get it?

Thanks
Me

[Ron Ramirez]

Depends. Do you mean a fuse in the turntable or a fuse in the amplifier?

I haven't heard of very many turntables having fuses, but if the amp has a blown fuse, you should try to get the service data for it which will give the proper ratings for the fuses.

You can find it here:

http://www.hifiengine.com/manual_library...-300.shtml

You will have to create an account to download the manual (free).

Good luck.

[OldRestorer]

I have the manual and it says they used special fuses in the amp but I cant find anything else.

Manual here
http://www.fisherconsoles.com/non%20cons...0%20om.pdf

[Ron Ramirez]

Sorry, I should have specified: You need the service manual, not the owner's manual.

The owner's manual won't have anything like that in there. The service manual should.

If you like, I can look when I get home. (I have a hifiengine account.)

[OldRestorer]

I will see what she says. She said she had it so I asked for a pic and the numbers on it.
Thanks for the help Ron.
Me

[Ron Ramirez]

Interesting...

Each stereo channel has two fuses (total of four, 2A each) plus a 2.5A slow-blow fuse for the line (mains).

So...go order some fuses. 1/4 x 1-1/4 inch, four 2 amp and one 2.5 amp slow-blow.

Away you go...away you go...away you go...

P.S. A word of warning: Do not run the amplifier without speakers hooked up to left and right channels - otherwise, you may blow some (or all) of the output transistors!

[morzh]

Ron

This is the first time I hear about output transistors blowing without the load....never had it happened to me while I was into building transistor amps. Do you know why?

[OldRestorer]

Good?

http://www.amazon.com/Bussmann-AGC-2-AGC...2+amp+fuse

http://www.amazon.com/Quality-MDL-2-5BC-...+slow+fuse

[codefox1]

Funny thing about this stuff, tube powered can be fixed, most solid state is hazardous landfill. You can still get a decent turntable for little money on EPay. But scour the web for a schematics and information.

[Ron Ramirez]

Mike

You would know more about this than I as you are an engineer, but...

From what I have read, transistor amps operated under a no-load condition can go into oscillation which can drive current high enough to fry (short out) the output transistors.