Forums :: Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives :: Books
Support This Site: Contributors :: Advertise


It is currently May Mon 21, 2018 12:02 pm


All times are UTC [ DST ]





Post New Topic Post Reply  [ 5 posts ] 
Author Message
 Post subject: 200 tube test data
PostPosted: Jan Sat 27, 2018 9:55 pm 
Member
User avatar

Joined: Sep Mon 18, 2017 2:23 am
Posts: 661
Location: Plymouth, MI
I've got a 200 tube to check and can't seem to find test data for my Hickok 600A? I was hoping one of the gang here would have the correct data.

_________________
Dan

I know just enough to be dangerous.....
(Member - Michigan Antique Radio Club)


Top
 Profile  
 
 Post subject: Re: 200 tube test data
PostPosted: Jan Sat 27, 2018 10:24 pm 
Moderator

Joined: Jan Thu 01, 1970 1:00 am
Posts: 36509
Location: Livermore, CA
Dan

Do not test 200 tubes on a Hickok tube tester. The 200 is a gas filled tube which ionizes with high plate voltage. A Hickok tester has too high of plate voltage for this tube so most will fail.

If your 200 has a good filament it will probably operate in a radio. I have picked up good 200 tubes from dud piles due to being tested on a Hickok.

_________________
Norm


Top
 Profile  
 
 Post subject: Re: 200 tube test data
PostPosted: Jan Sat 27, 2018 10:43 pm 
Member
User avatar

Joined: Sep Mon 18, 2017 2:23 am
Posts: 661
Location: Plymouth, MI
Thanks for the warning Norm. I'll check the filament only.

_________________
Dan

I know just enough to be dangerous.....
(Member - Michigan Antique Radio Club)


Top
 Profile  
 
 Post subject: Re: 200 tube test data
PostPosted: Jan Sat 27, 2018 11:25 pm 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 32446
Location: Maryland 20709, USA
The 200 (non-A) has a max plate voltage spec of 25 volts.
The max plate voltage for the 200A is 45 volts.

It's quite common to find ones that are bad / ionized due to previous owners' errors.
Once the plate voltage is exceeded, the gas ionizes. That cannot be reversed.

If you need one, I suggest buying only NOS ones from a knowledgeable dealer.
Vacuum Tubes Inc is a member here, and should be able to supply such.

- Leigh

_________________
73 de W3NLB
http://www.AtwaterKent.info
Click "Grebe Stuff" for Synchrophase info


Top
 Profile  
 
 Post subject: Re: 200 tube test data
PostPosted: Jan Sun 28, 2018 1:41 am 
Member
User avatar

Joined: Sep Mon 18, 2017 2:23 am
Posts: 661
Location: Plymouth, MI
Fortunately the one I picked up today at the MARC show was NOS.

_________________
Dan

I know just enough to be dangerous.....
(Member - Michigan Antique Radio Club)


Top
 Profile  
 
Post New Topic Post Reply  [ 5 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 7 guests



Search for:
Jump to:  
























Privacy Policy :: Powered by phpBB