Above is another view of Mr Blackham's unusual Nagra SNN. As far as I can see, apart from not having
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the various anodised legends on the deck plate, also absent are the adjustable AGC threshold knob and
7 p/ U" E, a, T" Athe transport lock-out 'switch' next to the meter. The cover 'hinge' arrangement differs slightly from later
# h0 ~& E8 }- @( O5 }( wmachines, as does the 'patina' of the anodised finish. A most interesting version, has anyone got another?
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$ r- z9 q6 X$ n(Apparently yes, I have recently been advised.)
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# T6 S) d2 u3 D2 UClick on either of the above images for more information.
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* For those who are looking at the stereo versions of this recorder often to be found on 'Eday', do
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There are now apparently four versions of the Nagra 'SN':
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9 {7 J" Y5 _0 R) _Nagra SNN - full track recording at 3 3/4 and 1 7/8 i.p.s. - high quality recording in Mono
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+ A/ v" U: D" oNagra SNS - half track recording at 1 7/8 and 15/16 i.p.s. - surveillance quality recording in Mono
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Nagra SNST - Stereo recording at 1 7/8 and 15/16 i.p.s. - surveillance quality recording in Stereo
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Nagra SNSTR (recent) - Stereo recording at 3 3/4 and 1 7/8 i.p.s. - high quality recording in Stereo
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Apparently for covert surveillance use it was preferable to have two separate recording channels to
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have some chance of capturing a muffled or distant conversations. So these older stereo machines will
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therefore be
optimized for speech recording only, and will also
run at low speed for maximum
% }! ]( g/ E5 v9 xrecording time and not fidelity. Actually Nagra made a special playback loudspeaker system (25100
) D+ w) g9 n: I/ L/ WDSP) with built in equalization to compensate for the quite limited frequency response of these
7 Y1 C: ] T& Precorders. A standard mono Nagra SNN running at 3 and 3/4, like the ones on this page are capable of
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truly Hi-Fi recording, but
the slow speed SNS and the SNST stereo versions are not. Perhaps it might
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be possible to convert these machines for Hi-Fi use, but this would involve replacing most of the
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electronics and be very expensive.
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Cheaper to buy a rather bette
r stereo
IV-S in the first place!
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9 y) M4 M# q0 ^% YTape for the Nagra SN
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* E$ a( Y! y" S; FI have been amazed at the prices some people have been willing to pay on that wild west auction site for
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the little reels of tape for this machine. When I first acquired my example from the BBC naturally I
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wanted to play with it and make some recordings. I knew that the tape was basically re-reeled cassette
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tape so I approached a tape duplication house in the UK and quite easily obtained a few part used
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'pancakes'. These are the un-flanged bulk reels of tape (about 10" dia) that are automatically wound into
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the cassette shells. I then contacted Nagra UK (always helpful) and obtained for around ?5 each
7 n/ P' a- N% J F+ m. Tseveral pairs of empty plastic reels. It then was quite a simple matter to wind tape off the pancake and
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onto the Nagra plastic reel (by using the hand crank on the machine). I did this a few years ago and
- W( A* Z5 t2 W, C% S$ W3 fthings may be slightly different these days, but perhaps worth investigating rather than spending some
! q( y: W9 e& [. C uVERY silly money.
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