A litlle help

[Alek]

Hi all

I have an old Cambridge Pye radio station that runs on crystals and I have only 2 of them so only one channel works... I`m searching for something that will make me able to change the frequency on RX & TX like a changeable crystal or something .. the station is an old PYE radio station, see it here:

http://www.pyetelecomhistory.org/prodhist/mobiles/mobiles.html#Cambridge_Series_AM10FM10_etc._1963

Thanks

 

[Nigel Goodwin]

There are really three possible options here?.

1) You're a radio amateur, and you've converted it to an amateur band. In which case you should know hwo to calculate and order crystals. To make it fully adjustable would require a frequency synthesiser, specifically engineered for the Cambridge - but it's not a trivial task.

2) You're a legal and licenced user, in which case you're only allowed to use the frequency you already have!.

3) You're an illegal user, and you shouldn't be messing with radio transmitters!.

 

[Alek]

There are really three possible options here?.

1) You're a radio amateur, and you've converted it to an amateur band. In which case you should know hwo to calculate and order crystals. To make it fully adjustable would require a frequency synthesiser, specifically engineered for the Cambridge - but it's not a trivial task.

2) You're a legal and licenced user, in which case you're only allowed to use the frequency you already have!.

3) You're an illegal user, and you shouldn't be messing with radio transmitters!.

The first here but I didn`t convert it... the curent settings are: 164TX & 175RX ... These are amateur radio frequencies but.. the diferecne is really big between them so I need to change them, I tried to find new crystals for it but with no luck .. Thats why I need something like a changeable crystal .. any idea ?

 

[JimB]

The first here but I didn`t convert it... the curent settings are: 164TX & 175RX ...

You are no radio amateur, what is your callsign?

These are amateur radio frequencies

No they are not!

JimB

 

[Alek]

Here they are ... and my call sign is z32gj

 

[JimB]

OK Goran, so you do have a callsign, but I still dont believe that 164/175Mhz is an amateur allocation in Macedonia.

What are the frequencies of the crystals in the Pye Cambridge at the moment?

JimB

 

[Alek]

Like I said... 164.**TX and 175.**RX ... and finding crystals for it is impossible .. I`ve searched almost everywhere

 

[Nigel Goodwin]

Like I said... 164.**TX and 175.**RX ... and finding crystals for it is impossible .. I`ve searched almost everywhere

As suggested, that doesn't sound like an amateur band? - it's high band VHF, and is probably the original PMR frequency?. You need to modify it to an amateur band (probably 144-146MHz), and recrystal it accordingly - there are various specialised manufacturers who will make the crystals to order for you.

But why not just get a real amateur radio rig?, it's not cheap having crystals made, and the Pye Cambridge was really a pity crappy performer!. I've got a Kenwood 25W 2m rig I don't use, I'd be open to offers!