Tubes Tested on a Digital AMPLITREX AT1000 Tube Tester.
Fixed Bias.
No H-K Leakage.
No Gas.
GM Takes Precedence Over EM.
Tubes Test as Follows:
GM[%]: 93/93, 93/93
EM[%]: 90/96, 93/93
Murphy's Law:
"All Tube Testers are Wrong but Some are Useful"
The Results on Your Tube Tester will Vary from These Measurements.
Returns:
We Offer 30 Day Returns with a Free Shipping Label.
Returns Accepted if the Items are Returned in the Exact Same Condition.
The Pull Tabs on the Tube Boxes Must be in the Same Condition.
The Cotton must be Installed on Each End of the Tube in Each Box.
The Pull Tabs will be secured so Tubes do not Fall-Out of Boxes During Shipping.
Carefully rubber band on the Pull Tabs to Open Boxes.
The flashing must be in the same condition upon return.
The Lettering on the Tubes Must Also be in the Same Condition upon Return.
Hold Tubes in Areas where there is No Silkscreen.
Tubes Must Test with the Same Results Upon Return.
Facts about Murph...
Dairy Farmed in Green Bay, WI until I was about 27 years old.
Started out my career in electro-mechanical, then Electrical Engineering.
Moved into Biological Engineering where I spent most of my career.
If you ever ate a candy bar, I might have had something to do with the quality...
Over the last 10 years, I have moved my spare time to repairing tube and discrete amps & receivers.
I like Fisher Receivers and Scott Amps.
I have too many tubes.
Statistics-driven when evaluating vacuum tubes > Certified Six Sigma Master Black Belt.
Testing Equipment: Two Nelson Hickok TV-7s, Two Hickok 539Bs, One Hickok 6000A and One AMPLITREX AT-1000.
As you can see, I have too many testers.
Murph really tries to to list and sell really good vacuum tubes.
Why buy from old Murph?
Integrity & Trust: Check my feedback.
I answer emails.
I ship fast. I pack well.
I use the Ebay return policy of 30 days.
If you have any problems and old Murph will take care of you. :-)
I want to ensure that you are happy with your purchase. Sometimes, Murph misses something. Murph is getting old and can make mistakes on occasion! Murph's goal is a 5-Star sale to you, my customer! If you feel that Murph has fallen short, feel free to contact Murph and we will get it straightened-out. :-)