Messages

1

Tape Tech / Re: Possible replacement for 5532 opamp?

« on: March 15, 2012, 08:02:29 AM »

Charles,  the LME49720NA is a dual inline package that will plug-in directly to the 5532 sockets in the Studer.  The SOIC version which you could use with a SOIC->dip adapter, if desired, is the LME48720MA.  There's even a TO-99 version, LME49720HA.

The app sheet has several circuit examples, including even, an NAB tape head preamp.

The 49720 has a little overshoot shown in a small-signal transient response graph, but no indication of large-signal transient response.  Bandwidth and phase response are excellent, though.  Looks like it might benefit with a little additional decoupling at the rails for each IC.

I do believe I'm going to try some of these.

--Bill

2

Tape Tech / Re: Possible replacement for 5532 opamp?

« on: March 14, 2012, 05:06:25 AM »

Thanks Charles. 
Is additional compensation for stability necessary or are they pretty much plug 'n play?

--Bill

3

Tape Tech / Re: Possible replacement for 5532 opamp?

« on: March 11, 2012, 08:33:55 AM »

Has there been any updates to preferable updates to the NE5532?  The LME49720NA looks really good.  The LM4562 seems like pretty much the same thing but without auto-shutdown, and the OPA2604 is quite similar but with a lower GBW (20Mhz vs 55Mhz).

Anyone with recent experience with these or other possible contenders in an A810/A820?

--Bill

4

Reel to Reel Tape Machines / Studer A180, value of console or upright versions

« on: February 02, 2012, 08:38:59 AM »

Can someone 'in the know' tell me what an A810, stock, in good working and cosmetic condition would be worth?  3 speed, high at 30ips.

Is its 'stock' audio reproduction (TP) good?  What about record quality?

--Bill

5

Reel to Reel Tape Machines / Re: MCI JH-110b 1/4" 2-track - I can get it for $600 - pics/vids inside

« on: February 02, 2012, 08:34:15 AM »

Overall, how is the audio quality of the record and repro sections of these machines?

--Bill