Vintage Receivers

amplifiers, receivers and loudspeakers
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Tinkaroo
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Re: Vintage Receivers

Post by Tinkaroo » 27 Oct 2019 09:52

I'm going to have a newly restored receiver to show here in a couple of weeks, but want to wait till I've had a chance to listen to it for a bit before showcasing it here. :wink:

tomh
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Re: Vintage Receivers

Post by tomh » 28 Oct 2019 14:58

Like many, I've owned and repaired my share of vintage receivers. My favorite vintage receiver is the Sony STR7065, which I bought new and still have. In the States, McIntosh performed clinics where they ran power output and distortion tests on their own and competitor products (brought in by customers). I recall the clinician commenting that my Sony was one of the few non McIntosh product that exceeded the FTC specifications producing about 75 watts per channel 20-20K both channels driven below .25 distortion. It's never needed realignment of the tuner, still makes full power and has only needed bulb replacement and slight bias recalibration since about 1974. My Marantz 2270 frankly is very cool but doesn't make power and has needed a lot of part replacement and calibration over the years.

Tinkaroo
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Re: Vintage Receivers

Post by Tinkaroo » 28 Oct 2019 20:27

tomh wrote:
28 Oct 2019 14:58
Like many, I've owned and repaired my share of vintage receivers. My favorite vintage receiver is the Sony STR7065, which I bought new and still have. In the States, McIntosh performed clinics where they ran power output and distortion tests on their own and competitor products (brought in by customers). I recall the clinician commenting that my Sony was one of the few non McIntosh product that exceeded the FTC specifications producing about 75 watts per channel 20-20K both channels driven below .25 distortion. It's never needed realignment of the tuner, still makes full power and has only needed bulb replacement and slight bias recalibration since about 1974. My Marantz 2270 frankly is very cool but doesn't make power and has needed a lot of part replacement and calibration over the years.
The Sony STR-7065 was an excellent receiver as we're all of the Sony 60 and 70 series receivers from the early 1970s. The 7065 was their top of the line.

Tinkaroo
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Re: Vintage Receivers

Post by Tinkaroo » 28 Oct 2019 20:28

tomh wrote:
28 Oct 2019 14:58
Like many, I've owned and repaired my share of vintage receivers. My favorite vintage receiver is the Sony STR7065, which I bought new and still have. In the States, McIntosh performed clinics where they ran power output and distortion tests on their own and competitor products (brought in by customers). I recall the clinician commenting that my Sony was one of the few non McIntosh product that exceeded the FTC specifications producing about 75 watts per channel 20-20K both channels driven below .25 distortion. It's never needed realignment of the tuner, still makes full power and has only needed bulb replacement and slight bias recalibration since about 1974. My Marantz 2270 frankly is very cool but doesn't make power and has needed a lot of part replacement and calibration over the years.
The Sony STR-7065 was an excellent receiver as we're all of the Sony 60 and 70 series receivers from the early 1970s. The 7065 was their top of the line.

Tinkaroo
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Re: Vintage Receivers

Post by Tinkaroo » 01 Nov 2019 17:54

Marantz 2238B Front.jpg
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Marantz 2238B Front 2.jpg
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Marantz 2238B Inside Top 1.jpg
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Marantz 2238B Inside Outputs. jpg.jpg
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Marantz 2238B Parts Changed.jpg
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This is my newly restored Marantz 2238B receiver which was serviced by the same tech who restored my Pioneer SX-939.

-It has had all the electrolytic capacitors replaced (other than the tuner) with quality replacements such as Silmic II, Nichicon Fine Gold and Panasonic. A bypass film cap was added at the main filter capacitors.

-The power switch and safety cap were replaced with new since the originals have proven over time to be problematic and even a fire hazard.

-The speaker relay was replaced with a new higher quality one.

-Some of the signal transistors have been replaced to reduce unwanted noise.

-The outputs were tested and replaced with new pads.

-All controls were thoroughly cleaned and bias and output adjusted as per factory.

-All lamps including pointer and indicator changed to LED for coolness and longevity.

The main benefit from all of these changes is to ensure long term reliability and to reduce any possible noise issues due to bad transistors, etc..Hopefully this receiver will be good for many years of trouble free listening which is the goal.
Last edited by Tinkaroo on 01 Nov 2019 18:13, edited 1 time in total.

spensar
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Re: Vintage Receivers

Post by spensar » 01 Nov 2019 18:01

That Marantz 2238B is a beauty and will sound as good or better than new I bet. Did you go with original type lamps or LEDs?

Tinkaroo
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Re: Vintage Receivers

Post by Tinkaroo » 01 Nov 2019 18:09

spensar wrote:
01 Nov 2019 18:01
That Marantz 2238B is a beauty and will sound as good or better than new I bet. Did you go with original type lamps or LEDs?
Thanks!

Actually I forgot to mention that all the lamps including indicator and pointer lamps were changed to LEDs.
This will reduce heat plus they should last a lot longer. The LEDs actually look great with the baby blue lighting on this series.

Bill_Ashton
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Re: Vintage Receivers

Post by Bill_Ashton » 01 Nov 2019 19:33

Wow...just wow!

cafe_liegeois
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Re: Vintage Receivers

Post by cafe_liegeois » 01 Nov 2019 19:40

Tinkaroo wrote:
01 Nov 2019 18:09
The LEDs actually look great with the baby blue lighting on this series.
De gustibus...

To my eyes, the only thing missing with this blue is a bit of cold draft. But, by all means, do enjoy it if you like it. ;-)

Ralf

jdjohn
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Re: Vintage Receivers

Post by jdjohn » 01 Nov 2019 20:00

That's a beauty, Tink! I'll bet it sounds pretty sweet, and should for years to come!

vinyl master
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Re: Vintage Receivers

Post by vinyl master » 02 Nov 2019 00:23

Loving that Marantz, my friend! Awesome job your tech did...I always say that if you find a good tech, like the guys I work with at Gibson's, treasure that relationship...The techs are our lifeline to great sounding music on and into the future...Getting the Marantz professionally serviced will extend the life of your Marantz for many more years to come and if they do a good job, you may want to send some of your other pieces to them! :-k

Great outcome, in any case, Tink! 8) =D>

Adamo0926
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Re: Vintage Receivers

Post by Adamo0926 » 02 Nov 2019 01:37

Sweet looking Marantz Tink ! I thing one of these days I will add a Marantz to my current collection....which only numbers 3 right now.....but at least all 3 are legendary receivers : )

Tinkaroo
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Re: Vintage Receivers

Post by Tinkaroo » 02 Nov 2019 09:05

Thanks guys! =D>

One other good think with a Marantz or similar vintage receivers is that they will hold their value, and the restoration costs are a better investment. It's also an investment in long term reliability and good sound quality.

You're right about appreciating the work of a good technician, which is why I trusted going back to the guy I got my restored Pioneer SX-939 from.

Tinkaroo
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Re: Vintage Receivers

Post by Tinkaroo » 02 Nov 2019 10:00

Adamo0926 wrote:
02 Nov 2019 01:37
Sweet looking Marantz Tink ! I thing one of these days I will add a Marantz to my current collection....which only numbers 3 right now.....but at least all 3 are legendary receivers : )
Yes, I agree you do have some legendary receivers in your collection to enjoy.

Yes a nice Marantz from the seventies would be a great addition to your collection. :wink:

Tinkaroo
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Re: Vintage Receivers

Post by Tinkaroo » 02 Nov 2019 10:33

Marantz 2238B Front 3.jpg
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Marantz 2238B Circuit Board.jpg
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Marantz 2238B Inside Bottom.jpg
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A few more photos of the Marantz 2238B. You can see the big filter caps are located in the bottom.

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