I remember seeing ads for this unit in old QST magazines (you know, the
little ones...). I believe it was made by a small obscure company as a
speech processsor for the Collins KWM-2 radio gear. Maybe early Autek stuff?



"Trent Hancock" wrote in message
ink.net...
Anyone know who made this speech compressor and maybe even what type
batteries it uses?

Thanks in advance,

Trent Hancock
KR4UW

Trent,
I looked it up and I think it's a DX Engineering speech processor. They
made 2 units, one for Collins 32-Sx transmitters, and one for the KWM-2
transceivers. Here are the model numbers:

LC-1-32S (for transmiiters)
RF LC-2-TR (for transceivers)

I believe the "RF" model is a true RF speech processor, while the other one
is just an audio compressor.
Hope this helps....

73
Mark W4UDX


"Trent Hancock" wrote in message
ink.net...
Anyone know who made this speech compressor and maybe even what type
batteries it uses?

Thanks in advance,

Trent Hancock
KR4UW

Mark, it's not a DX Engineering rf speech processor for Collins.
Those units were installed internal to the Collins equipment.
(You removed an i.f. amplifier tube, plugged the DX Engineering
device into the empty tube socket, and then plugged
the i.f. amplifier tube into the new socket on the DX Engineering device).

Trent's mystery device looks similar to a Comdel CSP-11
speech processor, but only because it uses the same cabinet
made by LMB.

The type of mic jack looks like that on a Drake TR-7.
I would guess this was a nice home-brew equivalent
of the Drake SP-75 speech processor,
with a headphone jack and volume control added for adjustment by ear.

73,
Ed Knobloch

W4UDX wrote:
Trent,
I looked it up and I think it's a DX Engineering speech processor. They
made 2 units, one for Collins 32-Sx transmitters, and one for the KWM-2
transceivers. Here are the model numbers:

LC-1-32S (for transmiiters)
RF LC-2-TR (for transceivers)

I believe the "RF" model is a true RF speech processor, while the other one
is just an audio compressor.
Hope this helps....

73
Mark W4UDX

That's right! I forgot about that. They did install internally. I am pretty
sure I saw old ads for that compressor...


"Edward Knobloch" wrote in message
news:70uKd.132$me4.69@trndny04...
Mark, it's not a DX Engineering rf speech processor for Collins.
Those units were installed internal to the Collins equipment.
(You removed an i.f. amplifier tube, plugged the DX Engineering
device into the empty tube socket, and then plugged
the i.f. amplifier tube into the new socket on the DX Engineering device).

Trent's mystery device looks similar to a Comdel CSP-11
speech processor, but only because it uses the same cabinet
made by LMB.

The type of mic jack looks like that on a Drake TR-7.
I would guess this was a nice home-brew equivalent
of the Drake SP-75 speech processor,
with a headphone jack and volume control added for adjustment by ear.

73,
Ed Knobloch

W4UDX wrote:
Trent,
I looked it up and I think it's a DX Engineering speech processor. They
made 2 units, one for Collins 32-Sx transmitters, and one for the KWM-2
transceivers. Here are the model numbers:

LC-1-32S (for transmiiters)
RF LC-2-TR (for transceivers)

I believe the "RF" model is a true RF speech processor, while the other
one is just an audio compressor.
Hope this helps....

73
Mark W4UDX

Trent Hancock wrote in message
ink.net...
Anyone know who made this speech compressor and maybe even what type
batteries it uses?

Thanks in advance,

Trent Hancock
KR4UW


Yes... I tend to agree... it sure looks like a Comdel speech processor (LMB
Box)---but I thought the Comdel name was on the front panel and had
different knobs... Check out the product review on the Comdel CPS-11 on the
ARRL website (I am not a member so I can't download it).

The Comdel was an exceedingly effective processor. It might be called an RF
speech processor (that's what Comdel claimed) since it took the mic audio,
convert it to an RF signal, process it, then demodulated it---output was
again an audio frequency.

A buddy WA9ZPR (where is he now) back in the late 1970's used one. That's
how I got to know him (we became ham buddies and had many skeds)... he was
on 20 meters as the band was about to go out demonstrating it to another ham
as I was listening. He would go from complete no copy to solid copy as he
would switch the device in and out.

RG