Daiwa DK210 keyer circuit - UK Vintage Radio Repair and Restoration Discussion Forum

dodgy-dxer · 6th Jan 2019, 2:14 pm

Can anyone help with a decent copy of the circuit for this Daiwa DK210 keyer please? Its in the user handbook

There is one on the internet but its unreadable (dk.mods)

Or the circuit for the Dewsbury Star Master Keyer MK2?

Aagain what is on the web is not really readable and is not the same model either (the ones I have found)

The PCBs look identical and its the grid block keying output that isn't keying

Thanks

73 Fred
G4BWP

dodgy-dxer · 6th Jan 2019, 7:46 pm

Received from G4XRV

Many thanks

73 Fred

G3VKM_Roger · 6th Jan 2019, 9:24 pm

Hi Fred,

Happy New Year.

Just a suggestion but if you have trouble with the grid-block keying on one or more of your keyers, I would recommend this kit:-

http://wb9kzy.com/keyallhv.htm

I use one with my K42 keyboard sender and it works well with grid-block and relay-keyed TXs.

73

Roger/G3VKM

dodgy-dxer · 9th Jan 2019, 5:58 pm

Quote:

Originally Posted by G3VKM_Roger

Hi Fred,

Just a suggestion but if you have trouble with the grid-block keying on one or more of your keyers, I would recommend this kit:-

http://wb9kzy.com/keyallhv.htm

Roger

Thanks

The DK210 does key a high negative voltage but this one has a fault. Hence the circuit request.

Im using WB9KZYs circuit to convert an old 6m valve amp with a -ve voltage on the PTT line to interface with "modern" radios

73 Fred G4BWP

dodgy-dxer · 9th Jan 2019, 6:01 pm

More thanks to G4XRV

Having tried his scanner he has loaned me the data sheet and I have made a high resolution, very readable, scan of the circuit.

If any one else is in need or wants a file copy please PM your email address

73 Fred
G4BWP

(Im not sure what his Forum "handle" is though?)

6th Jan 2019, 2:14 pm	#1
dodgy-dxer Heptode Join Date: Mar 2008 Location: Newmarket, Suffolk, UK. Posts: 612	Daiwa DK210 keyer circuit Can anyone help with a decent copy of the circuit for this Daiwa DK210 keyer please? Its in the user handbook There is one on the internet but its unreadable (dk.mods) Or the circuit for the Dewsbury Star Master Keyer MK2? Aagain what is on the web is not really readable and is not the same model either (the ones I have found) The PCBs look identical and its the grid block keying output that isn't keying Thanks 73 Fred G4BWP

6th Jan 2019, 7:46 pm	#2
dodgy-dxer Heptode Join Date: Mar 2008 Location: Newmarket, Suffolk, UK. Posts: 612	Re: Daiwa DK210 keyer circuit Received from G4XRV Many thanks 73 Fred

6th Jan 2019, 9:24 pm	#3
G3VKM_Roger Heptode Join Date: Jun 2012 Location: Southeast Norfolk, UK. Posts: 773	Re: Daiwa DK210 keyer circuit Hi Fred, Happy New Year. Just a suggestion but if you have trouble with the grid-block keying on one or more of your keyers, I would recommend this kit:- http://wb9kzy.com/keyallhv.htm I use one with my K42 keyboard sender and it works well with grid-block and relay-keyed TXs. 73 Roger/G3VKM

9th Jan 2019, 6:01 pm	#5
dodgy-dxer Heptode Join Date: Mar 2008 Location: Newmarket, Suffolk, UK. Posts: 612	Re: Daiwa DK210 keyer circuit More thanks to G4XRV Having tried his scanner he has loaned me the data sheet and I have made a high resolution, very readable, scan of the circuit. If any one else is in need or wants a file copy please PM your email address 73 Fred G4BWP (Im not sure what his Forum "handle" is though?)