[Vintage-Audio] Selecting Tape On H. Scott Amp

[WBob]

No..I think this is partially wrong...

In the old days tape transports and tape electronics were two 
different entities. It was possible to buy a tape deck that only had 
the transport and no electronics and to play a tape you needed to hook 
the play head to a properly equalized preamp. The tape preamp is very 
similar to a turntable preamp except the eq is completely opposite, 
going the other way in the gain vs frequency.

WBob

Fred Olsen wrote:
> Hi Duane,
> 
> I'll not copy this to the list for several reasons.  One, I don't have a 
> Scott at hand.  Two, this is from memory of how things used to be, so 
> some of it is conjecture.  Three, I ain't no expert.
> 
> The extra or auxiliary input is likely at line level with flat 
> equalization.  This might work for tape playback if the output of the 
> deck in question is equalized to flat.  It is more likely intended as a 
> mixer input, or simply a spare, for whatever purpose.
> 
> The rear tape loop jacks are what was actually intended to be used, and 
> this derives from "back then" when tape decks were not considered a 
> primary input source.  Before prerecorded tapes were common it was 
> assumed that the user would use tape for off-air recording.  I still 
> have boxes of tapes of The Met peeling away someplace.
> 
> When playing a tape one sets the tape monitor switch to "tape", which I 
> would expect to cut off other sources.  When recording, the "source" 
> position is obvious and the "tape" position will provide a check of 
> as-recorded if one is using a four-head deck.  That can be confirmed by 
> switching between the two and noting the transit delay.  With less than 
> four heads it simply follows the source.
> 
> The source equalizations of tape and disc were different.  The NAB 
> (National Association of Broadcasters) position is intended for a tape 
> source and the RIAA (Recording Industry Association of America) position 
> is intended for disc.  (I say disc to distinguish between "rec-ord" and 
> "ree-cord".)  Don't ask me to recite the specifics of either curve as it 
> has been way too long.  When playing a disc, set the equalization to 
> phono, and to tape for tape.  This function was integrated into the 
> input source switching on virtually all later preamps, and is separate 
> here because of the tape not being considered a primary source.
> 
> Further nuances would need to be determined from the operating 
> instructions and/or the skiz.
> 
> Best regards,
> Fred
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