PROBLEM: Nakamichi CR-7A Power Transformer

First of all, I would like to extend a HUGE THANK YOU to everyone who helped me figure out the problem with my CR-7A cassette deck.

I had made a couple of hasty assumptions, and you folks put me on the right track.

Now if I could only find a couple of 1-ohm, 1/4-watt fusible resistors....these things are BLOODY HARD to find!!!!!!!!!!!!

Umpteenode?

Where are you ? If it's really that hard in your locality, I'll bung a couple in a Jiffy bag for you ! I have a drawer full of 'em ...

Arfa

As I said earlier, MCM electronics stocks them. Other places that cater to the (rapidly dwindling) TV repair crowd like B+D Enterprises may help as well. Parts Express MIGHT have them, but they don't carry too many TV set parts any more.

--scott

SCOTT:

Thanks, but I have already checked all of those sites, including MCM. Nobody seems to stock a 1/4-watt, 1-ohm fusing resistor. I may have overlooked the part in my search results, but I have tried all of those sites (and others) multiple times.

I can't believe that this part would be this hard to find.

ARFA:

I may have to get you to send some to me. They are rare as hen's teeth around here.

Thanks!

Radiospares have them. Part No 267-1569

Well, if you need me to, just contact me off-group using the same e-mail address as I use to post. Even if you are the other side of the world to me, it's only gonna set me back the cost of a coupla stamps to get you out of trouble, and I guess that I can stand that without going bankrupt ...

Arfa

They have an absurd minimum order charge.

Graham

You can always top up with useful stuff - they have plenty.

NAh if you do that, you`ll end up with all the crap you ordered to make up the value, and the resistors will be out of stock!

Ron(UK)

Oh Ron, and haven't we all been *there* !! Last time for me just two weeks ago ...

Arfa

What exactly would the OP want to 'top up' with ? He's not a repairman.

Graham

Digi-Key part PPC1.0ATR-ND. That's a 1/3 watt and not a 1/4 watt but should be fine.

MCM only has half-watt ones, part number 370-1.

--scott

Thanks for all the help, folks!

I finally found 1/4-watt, 1-ohm fusible resistors from a supplier in Europe. They should be in my mailbox in about a week, hopefully.

It's weird that a part that I would have assumed to be fairly common is so hard to find in the U.S.

Have fusible resistors "gone out of style" in place of something else?

I was pretty sure I could have used a regular flameproof 1-ohm resistor for this particular circuit, but I was just paranoid enough to want to be able to use exactly the right part. Why? Well, the unit in question had undoubtedly been hit with some sort of voltage surge, causing several other power supply components to fry.

Those other components have been replaced, and the deck's power supply has been stable so far. However, this latest component failure, in a very low-voltage circuit that is completely unrelated to the previously-repaired circuits, shows me that there could be other weakened components hiding just about anywhere--so I might as well re- install ALL of the original protective elements and keep a watchful eye until I am convinced the deck is completely rehabilitated.

Not a bad philosophy at the end of the day.

Arfa

I just realized your nickname is the standard tuning of a guitar.

Yep! That's it! :-)

So i take it you play?