How to measurement iA avo ct160 tube tester - UK Vintage Radio Repair and Restoration Discussion Forum

mikko rintala · 1st May 2019, 2:50 pm

Mikko hi. I wonder how to measurement iA exsamble EL84 tubes? Avo mk4 show it right now but how Avo ct 160 show it?

Station X · 1st May 2019, 2:57 pm

Just go through the normal test procedure first selecting a suitable grid bias voltage and then making no further adjustment to the grid voltage. Once the meter is zeroed (bridge balanced) read the current from the anode current control scales. These controls have no effect on the actual anode current, they just enable it to be measured.

mikko rintala · 1st May 2019, 8:59 pm

Ou jee

of course. Now i am much happy.
Thank s

Best Regaird Mikko

John_BS · 3rd May 2019, 11:17 am

If you want to double check your result, remove the Anode 1 link and substitute a mA meter. It will read half the actual anode current

John

mikko rintala · 4th May 2019, 7:11 am

Hi. If i use that anode link, is upper or lower link +ve?

Best regaird Mikko

John_BS · 4th May 2019, 10:31 am

On mine it's wired with +ve closest to the hinge, -ve adjacent to the selector switch.

John

1st May 2019, 2:50 pm	#1
mikko rintala Triode Join Date: Aug 2018 Location: Kauhava, Finland Posts: 37	How to measurement iA avo ct160 tube tester Mikko hi. I wonder how to measurement iA exsamble EL84 tubes? Avo mk4 show it right now but how Avo ct 160 show it?

1st May 2019, 2:57 pm	#2
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: How to measurement iA avo ct160 tube tester Just go through the normal test procedure first selecting a suitable grid bias voltage and then making no further adjustment to the grid voltage. Once the meter is zeroed (bridge balanced) read the current from the anode current control scales. These controls have no effect on the actual anode current, they just enable it to be measured. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

1st May 2019, 8:59 pm	#3
mikko rintala Triode Join Date: Aug 2018 Location: Kauhava, Finland Posts: 37	Re: How to measurement iA avo ct160 tube tester Ou jee of course. Now i am much happy. Thank s Best Regaird Mikko

3rd May 2019, 11:17 am	#4
John_BS Octode Join Date: Dec 2008 Location: Wincanton, Somerset, UK. Posts: 1,780	Re: How to measurement iA avo ct160 tube tester If you want to double check your result, remove the Anode 1 link and substitute a mA meter. It will read half the actual anode current John

4th May 2019, 7:11 am	#5
mikko rintala Triode Join Date: Aug 2018 Location: Kauhava, Finland Posts: 37	Re: How to measurement iA avo ct160 tube tester Hi. If i use that anode link, is upper or lower link +ve? Best regaird Mikko

4th May 2019, 10:31 am	#6
John_BS Octode Join Date: Dec 2008 Location: Wincanton, Somerset, UK. Posts: 1,780	Re: How to measurement iA avo ct160 tube tester On mine it's wired with +ve closest to the hinge, -ve adjacent to the selector switch. John