Cirkit FET dip oscillator - UK Vintage Radio Repair and Restoration Discussion Forum

ex 2 Base · 1st Jun 2019, 2:17 pm

Cirkit remember them. About 30 years ago I assembled one of their kits. I have 5 coils, should there be six ? A couple of the coils have slight damage, I also the oscillator and sheet steel container. Can any one supply me with or point me in the right direction to obtain a copy of the original instructions. ted

mickm3for · 1st Jun 2019, 5:44 pm

Hi i think it is this one

??

Bazz4CQJ · 2nd Jun 2019, 1:48 am

If you also want to take a look at something describing the various different uses of GDO's in general, the manual for the Megacycle 59 GDO is a very good place to look https://www.pa3esy.nl/meetinstrument...urements59.pdf

B

Chris55000 · 3rd Jun 2019, 7:35 pm

Hi!

I've a feeling I've got an original copy of that Radio Comms mag. in my "Leaning Towers Of Pisa" in my bedroom somewhere!

I'll see if I can find it & get it scanned – unfortunately I'm off ill with foot pain at the moment so it may be a few days!

Watch this space!

Chris Williams

ex 2 Base · 3rd Jun 2019, 9:00 pm

Many thanks to all readers, I've now got a copy of the details from mich3for, I remember the article in Radcom. I was a member of RSGB and I made quite a few of the construction articles in Radcom. Ted

G8HQP Dave · 3rd Jun 2019, 10:05 pm

I have one of those. Some of the Cirkit kits were issued with an unauthorised component change: the RF chokes L2 and L3 were wrong (low Q, possibly?) and this stopped the circuit from working properly on all ranges. When I contacted them they quickly sent me the right ones and then the GDO worked fine. I only mention this because it may be that some people still have the wrong chokes and wonder why the thing doesn't work properly.

1st Jun 2019, 2:17 pm	#1
ex 2 Base Heptode Join Date: Nov 2009 Location: Scarborough, North Yorkshire, UK. Posts: 510	Cirkit FET dip oscillator Cirkit remember them. About 30 years ago I assembled one of their kits. I have 5 coils, should there be six ? A couple of the coils have slight damage, I also the oscillator and sheet steel container. Can any one supply me with or point me in the right direction to obtain a copy of the original instructions. ted

2nd Jun 2019, 1:48 am	#3
Bazz4CQJ Dekatron Join Date: Apr 2009 Location: Oxfordshire, UK. Posts: 4,935	Re: Cirkit Fet dip oscillator If you also want to take a look at something describing the various different uses of GDO's in general, the manual for the Megacycle 59 GDO is a very good place to look https://www.pa3esy.nl/meetinstrument...urements59.pdf B __________________ Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch.

3rd Jun 2019, 7:35 pm	#4
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,874	Re: Cirkit FET dip oscillator Hi! I've a feeling I've got an original copy of that Radio Comms mag. in my "Leaning Towers Of Pisa" in my bedroom somewhere! I'll see if I can find it & get it scanned – unfortunately I'm off ill with foot pain at the moment so it may be a few days! Watch this space! Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!

3rd Jun 2019, 9:00 pm	#5
ex 2 Base Heptode Join Date: Nov 2009 Location: Scarborough, North Yorkshire, UK. Posts: 510	Re: Cirkit FET dip oscillator Many thanks to all readers, I've now got a copy of the details from mich3for, I remember the article in Radcom. I was a member of RSGB and I made quite a few of the construction articles in Radcom. Ted

3rd Jun 2019, 10:05 pm	#6
G8HQP Dave Rest in Peace Join Date: Sep 2008 Location: Solihull, West Midlands, UK. Posts: 4,872	Re: Cirkit FET dip oscillator I have one of those. Some of the Cirkit kits were issued with an unauthorised component change: the RF chokes L2 and L3 were wrong (low Q, possibly?) and this stopped the circuit from working properly on all ranges. When I contacted them they quickly sent me the right ones and then the GDO worked fine. I only mention this because it may be that some people still have the wrong chokes and wonder why the thing doesn't work properly.