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 Post subject: nc57m speaker size
PostPosted: Jun Fri 14, 2019 6:21 pm 
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Joined: May Sat 17, 2014 2:56 am
Posts: 211
Location: Pocatello ID
Anyone know the size/type? I have one coming with a missing speaker.


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 Post subject: Re: nc57m speaker size
PostPosted: Jun Fri 14, 2019 6:36 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1193
Location: Wayside, NJ Monmouth
I have one on the hold bench awaiting recapping. I can take a measurement over the weekend and post the results.


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 Post subject: Re: nc57m speaker size
PostPosted: Jun Fri 14, 2019 10:20 pm 
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Joined: May Sat 17, 2014 2:56 am
Posts: 211
Location: Pocatello ID
Thank you so much! That would help very much.


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 Post subject: Re: nc57m speaker size
PostPosted: Jun Sat 15, 2019 12:58 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1193
Location: Wayside, NJ Monmouth
As per the manual, 5" PM Speaker


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 Post subject: Re: nc57m speaker size
PostPosted: Jun Sat 15, 2019 1:27 am 
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Joined: May Sat 12, 2012 1:33 pm
Posts: 1705
Location: Rochester, NY.
My NC-57 had low and distorted volume due to a frozen voice coil. The heat from the nearby output tube probably helped cook the speaker over the years.
I used a replacement Jensen 5" car speaker and mounted the audio transformer to the chassis. The magnet on the replacement speaker was a little larger and the fidelity is now pleasant to listen to.


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 Post subject: Re: nc57m speaker size
PostPosted: Jun Sat 15, 2019 2:22 pm 
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Joined: Nov Wed 25, 2015 9:46 pm
Posts: 61
There were a few versions of the NC-57. Mine has the output transformer mounted on the chassis. The main dials are also different. The replacement dial on Radio Daze does not match the one on my receiver. It's a fine radio with a circuit similar to the NC-125 but without the built-in Select-O-Ject audio filter.

John VE3PMA


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 Post subject: Re: nc57m speaker size
PostPosted: Jun Sat 15, 2019 5:57 pm 
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Joined: May Sat 12, 2012 1:33 pm
Posts: 1705
Location: Rochester, NY.
What was different about the dial? (Never mind, I just noticed that it is an 'M'). I think that Radiodaze also offered the NC-57 dials in green? Mine are amber.
It is a hot, self-contained receiver and was a decent value in its day. Great for broadcast listening.
I do miss the S-meter, but it isn't that critical. The NC-33 was the sparsely equipped one in this family.
https://www.eham.net/reviews/detail/2700


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