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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.

Dubya · Accepted Answer

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.

H> I purchased an item at an estate sale that is made by CVP Products (printed

Bob May · Answer

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?

Rob Mills · Answer

Rob Mills · Answer

Bob May · Answer

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?

Rob Mills · Answer

Dubya · Answer

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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