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Hi, I'm trying to find why this A77 MK2 has its capstan motor spining at maximum speed. The main psu has been restored and the +21V is ok. The capstan board has been checked as follows: - Electrolytics replaced as usual. No polarity errors, no wrong values. - RCA 40318 transistor found open. I...

Hi, I need to repair the CPU board which is revision 12. It has a few changes, one of which is the addition of a LM393 to the circuit enabling the electromagnet (driven by the BD679). All the schematics I found so far correspond to the previous version without the LM393. Another unit in my...

Hi, I'm trying to figure out the possible cause this problem after doing the following: - Full recap of the cpu board - Full recap and rechip of the motor daughter board (all CMOS chips tested bad with my TL866-II). - Replaced Q17 (BD679) which I suspected to be bad (didn't test well) but no...

Hi, I need to replace the idler tires in a Sony TD 152 SD. Anybody knows the model to use ? It's not just a matter of height, but also diameter to ensure proper friction against the pulleys. I don't know if the TC 153 and TC 154 share the same rubber rings. Thanks !

Hi, Somebody brought a faulty Teac A-3440 to me. I had to rebuild the power supply board and fix the capstan servo motor board as well. The guy put a new belt but I have no idea where it comes from. However, I think it's not appropriate as it always swings on the motor pulley when the motor...

Hi, I'm stuck and trying to understand the cause of the following problem: I have a Revox B215 which stops randomy in FF / REV modes. So far I did the following: - Recaping the power supply / control board (the one with the three MAB 8440 chips) - Recaping the daughter board (capstan driver) -...

Hi, I hope this post fits the forum. I'm asking this to improve some of my measuring equipment as actual gear is a lot easier to handle (LCD screens, exact frequency setting, precise counter, etc). I would like to find a function generator which also serves as frequency counter, which has good...

Hi, I'm interested in buying a Nakamichi T-100 audio analyzer (european version only, so not the 120V one). Thanks !

Hi, I'm looking for a Bernstein 2-305 demagnetizer (220V) which I find quite convenient. Handy, and the core is not the thin type I often see. Unless you don't recommend using this mode for any reason... Any info welcome. Thanks !

Hello, This is just a shorter to inform that a new version of my Barclay Crocker list has been uploaded. It includes over 30 fixes and one missing tape (DGR 2531 310, Beethoven's #3 "Eroica" with Vienna Philharmonic and Leonard Bernstein). The link and file name are same. Download here...

Hi, I've been using this machine for several years without trouble. I tried to finish playing a tape yesterday after listening to half of it the day before so the tape is correctly threaded. It will play without trouble as far as I keep the Play key pressed. The same problem occurs with the...

Hi, I noticed some refresh troubles with my Asus Xonar D2X, unless I am missing something. When I first tried to transfer some tapes, I plugged the Line In. It took some time until the input was detected as plugged and the driver or windows would enable it. Once done, I could see the Line...

Hello, I would like to transfer some mono and 2-track master audio tapes in HD. I have what seems to be a reputable sound card in my recent PC (Asus, i7, etc). From what I read on the box, this card can record at 192KHz 16/24 bits. However, I can't find a software which supports this...

Hi, Today was quite a tape day... Started getting 46 EMI tapes, of which 39 2-track Stereosonics, of which 12 are still sealed. Never got that many in a single shot. Photo here... Later in the afternoon, a guy sold me two 4-track decks (a Teac A3300SX and a Revox A77 with silver knobs) and...

Hi, I have been using my 4-track Revox A77 in a daily manner to listen to 1 or 2 4-track pre-recorded tapes every day for over a year. I restored it back then and it has always worked like a charm, until two tapes obtained from different sources started playing incorrectly. While Side 1 plays...

Hi, I'm almost done recaping this nice machine with Elna Silmic II caps, however I realized that three boards differ from what is shown in the service manual. The two Line boards (both same) have more resistors and capacitors. Same with the Mic board. Do I have an early or late unit ? If so, is...

Dear friends, Before all, I wish you a Merry Christmas ! I wanted to share with you a good news. You must have heard of the thick and expensive "Zeitschichten" book about magnetic recording history written by Friedrich Engel. Well, the third (and last) edition is now available in PDF format...

Hi, I'm wondering if Deutsches Grammophon (DGG) has ever published a catalog of the various titles they have issued on 4-track reel tape format (I never heard of any 2-track tape from them). While I often see the Beethoven/Karajan tapes, there are some rarer ones that I have seen only once or...

Hi, I wanted to know what 4-track auto-reverse R2R machine would replace my Revox A77 ? What I would like is: - Best sound (ok, hard question there, but something that would equal or beat my A77) - Better record/play quality at 3 3/4 ips (9.5cm/s) just in case I start enjoying that speed on...

Hello, For those who are interested, I will soon have finished my EMI 2-track pre-recorded tape guide. This guide is based on the 1958 EMI catalogue but I need the 1960 version to add some later titles. I would really appreciate if somebody could either scan the pink section for the tapes at...