Wow! Thank you soooo much for both explaining and showing how to check the RIAA curve! I had no idea how to go about determining if the phono stage was accurately producing the curve. Great video Tony, as always.

Tony, this has been an epic series. One thing I would like to see is how to properly pack one of these beasts to ensure safe shipment.

Tony, it is really a religious experience to watch you and listen to the unlimited knowledge that you put out there through your channel,thank you so much, God bless you and your family. Thanks

Your vids are really awsome, thank you. It would be real good to see a full alignment on the tuner, even if you upload the full unedited video to save you editing time. thank you for sharing thi amazing video 👍 👍 👍 👍 👍

Awesome videos.. thank you.. I've learned alot from these videos

Hi Tony watching your videos is like going on a big adventure keep up the good work Mike

Well done! Great show. Like the plates on top of the caps. Democracy works!

Nice work! I enjoy all of your videos and your presentation methods. I especially like your $11,000 scope and $1399 signal generator. :o)

Great job again! These discrete phono preamps are a must, easy to check and accurately filtered. As far as high quality caps were used, and they're mostly quality film caps, and as for the tune controls filters, they generally don't need special attention. One point is that eventual noise, but as you say, no need to change a paired FET if you've not closed all shieldings and checked ground loops. Another easy and somewhat less accurate is to use an anti-RIAA filter. This way, you can check if there is some gross bandpass or impedance troubles. Your method is a good compromise with the computerized analysis I also use with a good sound board and adapted software. The same method derived from analyse of loudspeakers impedance and dynamic response. A perfect reference RIAA curve can be used, but the most efficient and precise final test is your ears! With that kind of restoration, no doubt this Pioneer beast will be top quality, and for many years to come. I hope you'll find some time to show us the alignment procedure of he tuner part, as this is always a pleasure to see an experienced professional do that kind of thing.

@luisrodriguez8639

3 жыл бұрын

Discrete phono stage tends to be better sonically, I have a APT Holman up and running and I would not change it for today's phono stage's

Hey Tony well done sir! you are setting the bar high , all the best from your friends in the uk .

xraytonyb Again another video from you that gave me new ideas of how I could do some things in my projects too, Thanks so much for all that good ideas, informations and hints! Great video again :-D

Brilliant work Tony! Thanks for a great series.

Old school power right there

Hey Tony, you need another one of these to rebuild, namely mine. lol Really enjoy these videos and appreciate the care you take in making sure the job is done right.

Thanks Tony! The caps look nice!

Love What you do Good Job

Fantastic job! Many thanks for sharing!

OH PLEASE DO a complete video addressing the tuner "mess" on this model!!! I owned TWO of these back in the late 80's/early 90's and remember the tuners were quite nice. Also, I think you forgot to talk about those audio output transistors? Dual collecter if I remember right and they can be replaced with modern 3 legged jobs? Like to hear your take on the current limiting of the amps as well. An old techie friend of mine said they could be "tweaked" for more power or even eliminated but that might be playing with fire...........

I built in inverse RIAA "tester", from spare parts to test a phono pre-amp that I re-built. Because I used "spare parts" its not super accurate but it works. I really should buy that one you use in order to test the accuracy of the rebuild. If your phono pre-amp deviates by more than +-.5db from the IDEAL RIAA curve at any frequency then you have "colored" the sound. It's one of the most difficult circuits I've built due to its high gain (+60db @ 20hz), (+40db @ 1khz), (+20 db @ 20khz) and radical de-emphasis curve. As far as caps go, you can now by non-polarized (aka bi-polar) "audio grade" electro caps along with high value (up to 4.7uf) met-poly caps. (50 or 63 vdc rating). The input test signal should NOT exceed 5mv max. And then of course there's the stray noise. That's for MM only! Tricky stuff. Good discussion of the RIAA curve.

I was about to suggest a video on RIAA. If you allow me the suggestion , you could amplify the RIAA explanation given here on another future video. No matter how long your videos are I watch them with interest. Thank you very much and keep posting our projects.

I don't mind if you get deeper into the tuner alignment than you initially intended, so long as I end up understanding more about radios and their alignment. What's important and why?

Great vid Tony, you forgot the Edelbrock stickers for the cap covers lol. I always make little reflectors for those type of LEDs to reflect the wasted upward projected light back into the diffuser. Few small bits of polished aluminum bent up to standoff above the LED by a few mm. Makes a nice difference, and stops all that wasted light coming out through any vents on the top of the case. Someday I will have a monster like that in my collection. At the moment I have a strong penchant for 1970's Sonys with wooden cabinets. Keep well Tony and look forward to more.

😊😊👍👍

I am also interested in the "box" refurbishment. When it's as Pioneer intended to sell it, are all the minor irritating sound Gremlins gone?

Try using a inverse RIAA filter adapter.

Could we upgrade the Phono stage using a DSP RIAA equalization+Dual Adaptive Noise Filter board with stereo ADCs and Stereo DACs and associated filters to clean up the signal and remove mains hum so you hear nothing but what is on the LP.

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Very nice, Great job.

why does the phono stage have a power amp

@BlackSmokeDMax

4 жыл бұрын

I believe the signal is so low. The pre-amp brings it up to a line level signal. Which is the typical signal you would see when plugging a piece of gear into the receiver.

Wonder what this receiver would cost to build in 2021?

@xraytonyb

2 жыл бұрын

There is some really good gear out there today, and I've seen prices easily in the $20k -$30k range, just for an amplifier, which is waaaay above my budget ;)

Hello xraytonyb! Thanks for all the info shared. At the 7:30 mark you mentioned that this 1980 had a good phono stage. I own 1980's little brother, SX-780. Seems to me these two units share the same ps...am I right? Also, you stated that a MC cartridge cannot be used with this unit, a matching transformer must be used. Would that matching x-frmer be used at the AUX inputs or PHONO input ?

where is part 7

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@xspadharrycarey1683

5 жыл бұрын

So what’s that? A dot, a period, your IQ? Less than one. Why would you feel it necessary to never comment and just put a freaking dot? Do you have no life whatsoever and are you so desperate that you feel the need to be the first person to comment? Ooh, are you ten years old? You evidently don’t even have a coherent thought in your addled brain so you just put in a dot? What a pathetic loser! Why don’t you do everyone a favor and get off your “period”.

@buildstoys

5 жыл бұрын

@@xspadharrycarey1683 You okay bro? Are you so offended over a random persons internet comment that you feel the need to act tough and insult them? How about you just enjoy the video like the rest of us.

@conspiracies1014

5 жыл бұрын

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