Anyone know what this is?

[mfn002]

I found this in my radio station's storage building.

It has four frequencies:

384.6
346.7
582.1
524.8

[cg]

It is a radio usually used to alert volunteer firefighters of a call. The RF frequency appears faded otherwise someone could probably figure our who it was for. Guessing 60s or 70s vintage,

chris

[mfn002]

The RF frequency spot is blank.

[kc0wkp]

Basically it is a 2-tone radio monitor. Like a pager it is set to a specific frequency and it can either be set to receive the tones or be opened up to receive all calls.

This one used a crystal unit to select the frequency. You can open it up and there will be a small aluminum canister with a frequency stamped on it. This is the monitor frequency.

Here is some more info,
Rig Pix - Regency Executive On-Call Monitoradio
N4MW Regency Monitors Page

[mfn002]

Thanks. Unfortunately, my boss, who stuffed every last piece of electronic equipment used at the station in the last 40+ years in there, won't let me have it, even though it's cord has been cut and the telescoping antenna on top is broken.

[mfn002]

What are the four frequencies mentioned on the back for?

[ecps92]

Those are the Pager Tones

Originally Posted by mfn002

What are the four frequencies mentioned on the back for?

[mfn002]

Ah. Thanks. How do you change those?

[nd5y]

Originally Posted by mfn002

Ah. Thanks. How do you change those?

Probably by changing reeds.

[mfn002]

What kind of reeds does it use and what do they look like? I'm thinking about pleading my case to my boss and, with luck, get it.

[nd5y]

As far as I know all 1970s era monitors like that used tone reeds similar to what pagers used. Try googling the make and model number and "tone reed" or "tone filter". I don't know what they look like for that particular model. Probably a small metal can with the frequency or tone code labeled or stamped on it. It might look like some of the ones pictured here: G & G Communications

[mfn002]

I'm going back over there next Wednesday to work on the station's transmitter, which is housed there. I might take that radio apart and see what kind of reeds/crystals are in it. As I said before, that place (the station's former studios up until 1990) is FULL of cool vintage equipment, including the station's original AM transmitter--a Collins SR20.

[k3cfc]

Regency Executive On-Call Monitoradio used for many many years to trigger a tornaodo siren for a Fire Department.

K3CFC

[mfn002]

Oh. It can do that? I've been thinking about setting up a strobe alert for a weather radio because mine is in an area that isn't too visible. If I get it, I'll turn it into one.

[W2NJS]

If by chance you find a receive crystal in the unit that's marked something like, say, 45.250 mHz, just multiply that number by 3 and then add 10.7 and you'll have the frequency the radio is set to receive. As I recall, the Regency's used 10.7 mHz IF circuitry and this is the way you figure out the channel.

[mfn002]

Would a scanner crystal work in there, or would I need to find some sort of special crystal?

Unfortunately, I can't find much info on this model.

[kc0wkp]

Originally Posted by mfn002

Would a scanner crystal work in there, or would I need to find some sort of special crystal?

Unfortunately, I can't find much info on this model.

You will need to open it up and see what type of Crystal it takes.

[mfn002]

Originally Posted by kc0wkp

You will need to open it up and see what type of Crystal it takes.

Will do. I don't want get too involved in this, in case of the somewhat likely event that I get turned down.