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    how do I use the same surround sound speaker system for different devices?

    Hello, Welcome! Usually a surround sound system has a central component, usually a surround sound receiver, that acts as the control center and power source for the complete system. In all likelihood this component might have the ability to add another source (such as the stereo unit) as...
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    An appreciation of an Ampex 351 tape deck

    Hello Jerome, Thank you for your comments. Dave is a great guy to work with, he reconditioned the capstan motor I use and did a great job. He also helped integrate the Tentrol with the Ampex control box by providing a box with cables attached so I could see what was involved. The change of the...
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    An appreciation of an Ampex 351 tape deck

    I have nothing but a great deal of respect for the engineers who designed this machine and the people who built it. I'm not sure how the transport compares to more recent decks, but the 351 transport reaches correct playing speed within 1/10 of a second with no tape bouncing at all. When the...
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    An appreciation of an Ampex 351 tape deck

    The transport weighs 50 lbs and each electronics chassis weighs 18 lbs, Ampex offered this model as a portable version in two road cases. Not too much weight to lug up three flights of stairs to a remote recording location, I guess. Recording engineers were tougher in those days. Or, they had...
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    An appreciation of an Ampex 351 tape deck

    Thank you, I appreciate your comments. To answer your question, sigitask, yes there are conventional steel rack type rails attached to the insides of the enclosure. I was very fortunate that the bottom section was exactly the needed dimensions for mounting the two electronics sections and that...
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    An appreciation of an Ampex 351 tape deck

    I decided to change the cosmetic appearance of the cabinet, so I had a local woodworking shop create new upper and lower panels.
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    An appreciation of an Ampex 351 tape deck

    The rear of the cabinet showing the Tentrol constant tension attached to the side.
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    An appreciation of an Ampex 351 tape deck

    Thank you, I appreciate your comments.
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    Advent 100A Dolby B noise reduction.

    Thanks for your comments, Charles. I believe Integrex made both a discrete and IC based unit, I have the later and it sounds quite nice especially if it remains on all the time. In my opinion what contributes a great deal to the sonic differences between various manufacturers is their post...
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    An appreciation of an Ampex 351 tape deck

    Since the playback electronics of the 351 uses an output transformer to provide a balanced output and to reduce distortion I wanted to find out what improvements could be made using a different transformer. I ordered two transformers from the Electra Print company using silver wire for all of...
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    Advent 100A Dolby B noise reduction.

    Thank you for your suggestions, I've started looking at the 6922 and what I would need to do. Any thoughts on how a 5751 in place of the 12AX7 would do? I think I have some black plate RCAs in my Conrad Johnson I could try. Again, thanks!
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    Advent 100A Dolby B noise reduction.

    I thought I would see if I could make some measurements of this preamp using different tubes. Keep in mind this is a linear amplifier there is no equalizing needed, what goes in gets increased by 37dB and appears in the output. I tried three different new production tube sets (a single 12AX7...
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    Advent 100A Dolby B noise reduction.

    Thank you, I've learned quite a bit from this project. I probably don't need that much gain since the original design incorporated tape playback EQ and I was making the circuit linear the open loop gain could be reduced. The original design had used the second tube's (12AT7) first half used as...
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    Advent 100A Dolby B noise reduction.

    The second half of this project is nearing completion, the tube based preamp that takes the signal from the Dolby processor and provides sufficient gain to be connected to my system. The idea was to not use the transistor based amplifier found in the Advent and have some fun and learning...
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    Advent 100A Dolby B noise reduction.

    After polishing the Advent's faceplate, control knobs and selectors and cleaning up the real wood cabinet this part of the project is completed. Now to do some finishing touches to the tube output stage and some extended listening.
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    An appreciation of an Ampex 351 tape deck

    Hi Jerome, Thanks for your comments! Dave is certainly an authority for all things dealing with Ampex plus he's a generous person. Good luck with your project, are you planning to record yourself with the converted 351?
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    Info on a pioneer sa 610

    You're welcome! Cheers!
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    Advent 100A Dolby B noise reduction.

    Perhaps a bit of information about the Barclay Crocker tapes would explain my attempts at getting the most sound quality from them. The company was in operation from 1977 until 1986 and was based in Poughkeepsie, New York. During that time they produced approximately 350 titles. Most of the...
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    Info on a pioneer sa 610

    Hello Scott, Welcome to the forum! It would probably be best to use a speaker selector box to connect the speakers to the integrated amplifier. The classic Adcom GFS-4 would be a good consideration. It will maintain an 8 ohm load whenever multiple speakers are selected.
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    Advent 100A Dolby B noise reduction.

    Thank you, Larry. The goal is to decode old tapes, ones that I've collected over the years, especially the Barclay Crocker and the Philips recordings. After making some adjustments to the feedback resistor I was able to play some music. In this photo I'm using my Stellavox Sp7 to play a Barclay...
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    Advent 100A Dolby B noise reduction.

    Anyone who has collected prerecorded tapes from the Barclay Crocker company has become aware of the limitations imposed by the necessary decoding of the Dolby B noise reduction used by that company. Over the years I've assembled quite a few Dolby B units from Teac, Sony, Advent and Integrex and...
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    An appreciation of an Ampex 351 tape deck

    I live in the US so the line frequency wasn't a problem.
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    An appreciation of an Ampex 351 tape deck

    Hello, I'm afraid I no longer have that person's contact information, sorry. I can very highly recommend Dave Dintenfass at Full Track Productions located in Seattle, WA. www.fulltrackproductions.com is his website. He is an authority on Ampex equipment and offers skilled rebuilding services on...
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    An appreciation of an Ampex 351 tape deck

    Hello, Thank you for your comments, I appreciate connecting with other people who enjoy these classic machines. Many years ago I began assembling components for both the electronics and the transport. At the time there was a great deal more opportunities to find people who were selling NOS...
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    Studer A807 MK1 died due to a shorting problem. Help please

    Hello Jascha, You might want to contact "Ki Choi" a member on the Tape Project forum, he has experience with the A807.
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    UltraAnalogue Recordings releases 2 more tapes by star cellist Narek Hakhnazaryan

    I've always described my audio interest to other people by explaining that it is an example of technology serving the cause of music appreciation and understanding. As I became interested in audio equipment, many years ago, I started reading the liner notes of classical and jazz records and from...

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