Fisher MPX 120 - Power Question

[Paul-Fisher]

Hello,

I recently purchased a Fisher Heritage Series Credenza, which has a Fisher Phillarmonic Tuner and a Garrard Record Player.

The tuner is connected to a Fisher MPX 120.

my question is I do not see a power connector for it. I do see some power leads coming from it but it doesn’t fit a standard outlet.

Any thoughts on what power adapter I need for this?

 

[TriodeLuvr]

The original fiberboard panel had a line cord attached and the mating plug was part of the panel. It was a safety feature (interlock) so the console couldn't be easily powered if the panel was removed.

Jack

 

[gadget73]

these used to be called "cheater" cords. If you poke around on the internet you ought to be able to turn one up under that name.

 

[RWood]

Do you solder? If so you can take an extension cord, cut off the female end and solder the two leads where the cheater inlet is connected.

 

[gadget73]

or just lop the socket off entirely and put a standard plug on it. Add an extension cord and it will get you anywhere you need to reach.

this has a power transformer so it won't be unsafe in that arrangement. The bigger need for interlock cords (the official name) was on hot chassis stuff where you could zap yourself by touching the chassis inside. Things with power transformers don't have that issue so its not a safety hazard.

anyway, you are missing one of the output tubes, just in case you weren't aware. This is a two channel push-pull amp using ELL80 / 6HU8 tubes. One tube per channel. I see the empty socket there under the shield. I have one of these chassis in my workshop for computer duty. Its actually a pretty competent tuner and doesn't sound bad either. Only good for 8 watts or so but its a decent 8 watts. The big drawback to this one, no magnetic phono stage. Can add one between the phono inputs and the turntable if you want to upgrade the cartridge though.

also those output tubes aren't particularly cheap. Its basically 2 tubes in one bottle, and not the most common thing.

 

[TriodeLuvr]

this has a power transformer so it won't be unsafe in that arrangement.

Well, the chassis won't be unsafe, generally speaking, compared to one that's connected directly to the line. However, there's still the high voltage within, and ground leakage can present a hazard if this unit is in the proximity of third-wire grounded equipment. Just saying it still requires an experienced tech to work on this safely. We can't make assumptions about the OP's credentials in this regard.

Jack

 

[cademan]

Generally speaking because it has a power transformer, it makes it more safer than not.

Most of us tube guys here who have been doing this 50+ years are more comfortable with anything employing a transformer. I am not saying that I am any less cautious working on them with the high voltage it takes to run on the plates of the tubes, but I (might) speak for a lot of people here when I say I have worked on my share of hot chassis' and 50 years later, they still scare me especially with my memories of getting shocked by one when I was 10.