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I'm just wondering why stereo tapes (2-track, broadcast) didn't use different azimuts like video tapes (i.e //// on L channel and \\\\ on R channel). This would have considerably reduced (if not totaly eliminated) the diaphony, and also allowed larger tracks of 3mm for example, thus better...

Hi, Just got ten 10" Revox reels in light gray plastic case. The tapes have a dark gray backside and almost black oxide. Anyone knows what type this is, and what are the closent tapes speaking of bias and maximum recording level ? Are these equivalent to Maxell 35 and RMG35 ? Thanks !

Hi, The question is kinda difficult to ask especially since things move so fast and since there must be so many solutions, but at least this will avoid some obvious mistakes. I'm still using a Revox PR99 to record broadcasted concerts, and sometimes happen to record piano competitions in Paris...

Hi, The two original input level pots drifted and the recording levels weren't matched. I therefore put two new originals from Studer, but they no longer have the same value. Moreover, they are double 50K pots instead of single 5K, causing the level to jump from none to high at only position...

Hi, I'm looking for a dual balance (25K linear from memory) potentiometer for a Revox A77. The pot works, but makes constant noise while rotating, and contact cleaners won't help even after putting quite a lot of it inside the pot. I won't mind getting a used one as far as it's tested in great...

Hi, I'm always looking for old AEG Magnetophon machines (1935-1945) and tapes. I have the FT4 and the K8. Will only consider fixed price propositions. Thanks ! David

Hi, I currently happen to record a piano competition and some private auditions using an old Nagra III which works great. I also just put a hand on a Nagra E but I don't like being limitated to 7.5ips. Currently, I can record without loss on these two ones, meaning that I can immediately switch...

Hi, I recently got a small 4-track Akai deck with GX heads and two pre-recorded reels with classical music and jazz. As I liked the sound, I thought I could build a small collection of classical titles that I often listen to, but before that I wanted to know the following: - Since lots of these...

Hi, I'm looking for the service manuals for: - Nagra SNST reel recorder (not the SNST-R but the usual SNST) - Nagra DSP playback unit for the SNST Both are not working. The recorder outputs some DC and the amplifier outputs nothing. Thanks ! David.

Hello, Anyone has some schematics for the various German AEG Magnetophon models ? Especially models FT4 and K8. My K8 schematic looks incomplete. There're a few things added in my machine, or which have not been put on the schematic (it could be an earlier one as well since there were so many...

Hi, Where can I find a similar tool as this one, for other tape types (using AEG cores) ? The pictured one refers to the PER525 tape but works with all 52µm tapes. Any ideas ? Thanks !

Hi folks, I'm just checking a lot of 100s of 10" reels I bought a few months ago. All are from RTL radio (Paris). Tapes are mostly PER525 and PEM468. I want to keep the "nicest" ones (i.e not shortened or with too many splices) to record live concerts. I ussually record PER528 tapes but I have...

Hi, Anybody can supply the schematic and service information of the Nagra SNST and its DSP amplifier unit ? Thanks, David

Hi, I put a hand on a couple Quantegy 478 reels. I usually use PER528, Rmgi LGR35 and Maxell XL35 but don't know about the 478. Is it bias compatible ? Is it a +3 or +6 ? How thick (in microns if possible) ? Thanks in advance, David

Hi ! I just got two AEG AW2 recorders from 1948-50. One is 19/38 and the other is 38/76. They both use the same chassis and I have no schematic. Anybody has some technical documents on those AEG machines ? I'm also looking for the schematics of the amplifiers used in earlier models like the K3...

Hi, I have a Sennheiser MD21 microphone which I use to make monoral recordings with an old Nagra 3. I'd liket to find the correct base for it, as it's to be screwed on something (see pictures). I'd mostly record piano for my personal use so the base has to be like those used in concerts. I...

Hi, My B77 is currently back to service so I put a PR99 (read only) to play my tapes in the mantime. The problem is, the outputs are XLR balanced type, and the machine is to be connected to a normal amplifier with RCA plugs. I currently connected the headphone output to the amplifier input and...

Hi, I just acquired a Stellavox SP7 machine, configured in stereo (record / play). It also has a sync head. I'm looking for the schematics of the plug-in modules because as their PCBs are housed into aluminium shields with some resine, which avoids any service, and I'd like to eventually...

Hi, I salvaged a number of those old tapes which date the 1970s. They have AEG cores and are stored in round metal boxes like films and have a pink backside. I just wanted to know how good they were and what is the closest "modern" tape to see whether they match my bias settings (LGR35)...

Hi, I just wanted to know whether there is a way to allow the 3.75ips (9.5cm/s) speed on my Revox B77MK2, which only does 7.5 and 15. It's a 2-track machine, so it's only meant to play old mono tapes recorded on both side and transfer them in a single pass. Any hints ? Thanks, David.