Volumax 4110 Manual/Schematic

[WNTIRadio]

Hi all,

Does anyone have a manual and/or schematic for a 4110 (they're the ones that look like pizza boxes) anywhere in their files? I will gladly pay for copying and postage. A .PDF would be even better if you already have one.

Just tinkering in the studio with it... would be nice to get it back to spec and use it for weird things like limiting tracks for recording.

Thanks!

 

[HadYourPhil]

I have the manual, but it is very large.
That wasn't one of CBS's better units IMHO. It was their last (?) attempt to make an FM limiter, but it took Bob Orban to figure out how to properly process FM's pre-emphasized audio.

To use it for track limiting, I would strongly recommend disabling the pre-emphasis circuitry.

 

[RadioMan203]

In anybody happens across a PDF of this I'd be interested as well.

 

[rorban]

I have the manual, but it is very large.
That wasn't one of CBS's better units IMHO. It was their last (?) attempt to make an FM limiter, but it took Bob Orban to figure out how to properly process FM's pre-emphasized audio.

The last FM Volumax was the 4111. IIRC, it replaced the clipper in the upper band of the HF limiter with a limiter to reduce distortion. It sounded substantially cleaner than the 4110.

Bob Orban

 

[rrsounds]

I have the manual, but it is very large.
That wasn't one of CBS's better units IMHO. It was their last (?) attempt to make an FM limiter, but it took Bob Orban to figure out how to properly process FM's pre-emphasized audio.

The last FM Volumax was the 4111. IIRC, it replaced the clipper in the upper band of the HF limiter with a limiter to reduce distortion. It sounded substantially cleaner than the 4110.

Bob Orban

While I can't help with the 4110 manual, I do have the book for the 4111.

I remember that the additional/replacement HF limiter board was really dense. By 1970s standards, anyway, LOL! It was totally different from the other boards.

IIRC, if you bypassed your stereo generator's pre-emphasis/LP filtering along with the output de-emphasis networks in the 4111, you had a system that was at least somewhat competitive to the 8000. If only they'd had Orban's filters!!

Kind Regards,
David

 

[WNTIRadio]

I'm trying to go for that kind of squashed, pumpy 70's FM sound on a couple of tracks, so this will be perfect for the job, complete with the pre/de-emphasis. Trying for that WYNY sound!! Was the 4111 the same as the 4110 except for the replacement HF limiter board?

 

[HadYourPhil]

Thanks for the clarification, Bob. I'd love to see the schematic for the 4111's additional circuitry.
When was that produced? Was that the last CBS/Tompson processor of any type?

 

[HadYourPhil]

No editing after the fact!!

"WNTI RADIO"... I tried to email you but it bounced. Please email me and I'll try to help you.

 

[rorban]

Thanks for the clarification, Bob. I'd love to see the schematic for the 4111's additional circuitry.
When was that produced? Was that the last CBS/Tompson processor of any type?

I have a lot of old processor manuals around, but unfortunately, the Volumax 4111 is not among them.

As far as I am aware the Volumax 4111 was the last audio processor that CBS/Thompson sold to consumers. I remember seeing a prototype of a multiband procressor (probably at NAB), but it never was put into production, probably because Thompson realized that there was a lot more money to made by concentrating on the video side of television.

 

[satech]

Did the later FM Volumaxes make any attempt to include 15 kHz filtering, or was that still supposed to be handled by the stereo generator?

 

[rorban]

Did the later FM Volumaxes make any attempt to include 15 kHz filtering, or was that still supposed to be handled by the stereo generator?

I don't recall any FM Volumax as including 15 kHz filtering.