Ferret collar frequency on LW radio

[beany01 223]

Hello, does anyone know the rough frequency a LW radio picks up the mk1 ferret collars? Cheers James

[terryd 8,583]

I saw a post on another forum of some one using a radio for that. No mention of the frequency though. Said it worked fine once you got hang of it or at least well enough and better than nothing 

[Arry 22,350]

Just saw your post, thought I would have a mess about. Got an old radio tape player out that my lad left behind turned in on Long wave and bxgger me it started clicking it was on about 150 KHz to 160 KHz down near the bottom end.

That was a MK 1 collar.

Cheers Arry 

Edited September 5, 2018 by Arry

[terryd 8,583]

Well fancy that handy when the old funds are low 

[beany01 223]

Thank you very much. I actually have two mk3ms, but I’m working out calculations to make mk1 collars. Until I get some more testing equipment, Thanks to what frequency you have just told me, I can now work out the coil, cheers James

[beany01 223]

Well I’ve just picked up a LW radio. They are getting thin on the ground now now everything is going digital. Time to have a play wrapping coils!

[beany01 223]

The radio picked up the mk3m collars also. I wound a coil and after a couple of attempts got roughly the correct frequency. There must be a slight flaw somewhere, as the circuit isn’t pulsing, just a constant signal. 

[Arry 22,350]

2 hours ago, beany01 said:

The radio picked up the mk3m collars also. I wound a coil and after a couple of attempts got roughly the correct frequency. There must be a slight flaw somewhere, as the circuit isn’t pulsing, just a constant signal. 

 

 I broke one apart I think there is other components, Quite a while ago now but think there was a capacitor and a resistor in there mate.

Cheers Arry

[beany01 223]

I’ve already made the circuit, but for some reason it’s not oscillating. I will have to test further

[Moocher71 4,050]

My brother used old radio yrs ago,he said it worked ok,

 

[Ferretter93 6]

Seen a post stating 150-160 seen another stating 190 and even 457 khz, I can post pics to you and even diagrams with schematics