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Rob Mills - 25 Jul 2005 17:06 GMT

I purchased an item at an estate sale that is made by CVP Products (printed
on circuit board), it has the # HRN-1 on the circuit board. It's a metal box
aprox 9 in wide X 5 in deep X 1 1/2 in H. The front has 5 dpdt switches
(probably 3 -4 $ switches) with center off, push button circuit breaker, a
volume control (pot) and an off and on switch. The back has two RCA jacks
and a circuit breaker for the ac line cord. There are no markings on the
enclosure other than numbers on the 5 dpdt switches.

I think it's related to the RR hobby as there was some other RR items at the
sale but am not sure. Thought maybe I should find out what it is before I
start salvaging it for parts that I could use. Rob Mills ~ Tulsa

PS, Circuit board has 4 IC's and 4 transistors. Transformer is 6.3 volts
either side of center tap.

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Dubya - 25 Jul 2005 18:28 GMT

Sounds like the horn simulator CVP made waaay back when. The DPDT
switches "tune" the horn sound effect to match specific diesel horns.
There should be a momentary toggle or pushbutton to sound the horn on
the front panel next to the switches. The RCA jacks are speaker
outputs. Kinda neat gadget to put a horn sound effect in one location.

Keith Gutierrez published an article on a horn matching your
description in the February 1989 issue of _Model Railroader.

Hope this helps!
Dubya

> I purchased an item at an estate sale that is made by CVP Products (printed
> on circuit board), it has the # HRN-1 on the circuit board. It's a metal box
[quoted text clipped - 7 lines]
> sale but am not sure. Thought maybe I should find out what it is before I
> start salvaging it for parts that I could use. Rob Mills ~ Tulsa

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Rob Mills - 25 Jul 2005 19:03 GMT

>>> Sounds like the horn simulator CVP made waaay back when.<<<

I'll bet you nailed it, date on circuit board is 1988. I'll hook some
speakers to it later this evening and see what happens.

Thanks to both of you for responding, RM~

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Rob Mills - 26 Jul 2005 02:17 GMT

>>> I'll hook some speakers to it later<<<

I just hooked them up and believe it's blown. What I thought to be a front
panel circuit breaker turned out to me a momentary on switch. When I pushed
that switch I got a faint tone out of one speaker that seemed to change
according to how the 5 dpdt switches were set.
Oh well, got my moneys worth in switches and etc which is the reason I
bought it anyway.

Thanks all, RM~

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Bob May - 26 Jul 2005 19:55 GMT

The output isn't for a speaker but rather to be driven to other electronics.
It's called line output. A speaker would indeed make only a faint sound if
you hooked it up directly. Put a power amplifier between the speaker and
the unit and you will be rewarded with substantial sounds.

--
Why isn't there an Ozone Hole at the NORTH Pole?

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Rob Mills - 26 Jul 2005 23:43 GMT

>>>> It's called line output.<<<<

Believe it or not that (I have one of those PC controlled short-wave radios
that uses a line out)crossed my mind but I later dismissed it. Thanks for
the jog, I'll hook it to a small amp that I have buried in the garage if I
can find it. RM~

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Dubya - 27 Jul 2005 12:27 GMT

Oh, bother - of course, it's a line out. Hence the RCA jacks instead of
the usual speaker-wire terminals. That way you can hook it up to
whatever you want (sound system, stereo, etc.).

No more decaf for me!

DUHbya

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Bob May - 25 Jul 2005 18:39 GMT

CVP Products is a vendor of DCC and RailCommand systems for model
railroading. It souunds like you have a component of one of those systems.
Do a google for them for further info.

--
Why isn't there an Ozone Hole at the NORTH Pole?

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Model Forum / General / Railroads / July 2005

What have I got?