Tubes Asylum

RE: Great reliability IME

201.17.68.151

casouza

In Reply to: RE: Great reliability IME posted by bernard991 on March 19, 2008 at 13:46:47

Greetings!
I have the Fluke 61 point-and-shoot IR thermometer. It does look like a "laser gun". I bought it from tequipment.net.
There are also good offers on Ebay.

If you decide to buy one, make sure it reads up to 300 degrees centigrade (roughly 580 Farenheit) or more, because some transmitting tubes may reach 220 degrees centigrade (450 F) at the plate, under normal operation.
Your output tubes will probably measure 300 F or less, pointing the meter at the plate.

I do not have Prima Luna amps. The hint about power transformer temperature came from a friend and applies to most amps, because power transformers are wound with enameled copper wire, which has a maximum temperature spec.
Enjoy your amps!

Follow Ups:

RE: Great reliability IME - bernard991 23:29:17 03/20/08 (2)
I have checked out the 61 and goes to 275C only ...the 65 goes to 500C
maybe it is a better bet ?
they are not shaped like a pistol but rather a remote control ..is this your model ?
cheers
- RE: Great reliability IME - casouza 11:23:33 03/21/08 (1)
  Yes, Fluke 61 is the one I have.
  I did not realize it measures "only" up to 275 C.
  My advice and description were based on the cheaper IR thermometers I saw on Ebay.
  
  On second thought 220 C is the highest tube glass envelope temperature I have seen on tube data sheets.
  I suggested a wider range to make the tool future-proof, because a transmitting tube with red-hot plates will measure more than 300C. Anyway if you are not into "electric chair" DIY high-power SET amps, the suggestion is moot.
  
  I have measured at the most 150 C on class A KT-88s, pointing the laser straight at the plate structure.
  I hope this clarifies.
  - RE: Great reliability IME - bernard991 17:45:58 03/21/08 (0)
    so perhaps the 61 would be fine ....
    thanks for your input !

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

This post is made possible by the generous support of people like you and our sponsors:

Schiit Audio