Pins Straightened & Cleaned with Proprietary Process
Tube Surfaces Cleaned
"Plug & Play"
Testing
Tubes Tested on a Hickok TV-7A/U Tube Tester
Tubes Test as Follows:
89
94
Calculated % of NOS Tubes [%]: 96, 111
No Shorts.
The Calculated Average for NOS Tubes is 85.
TV-7A/U Minimum for 6C4 Tubes: 55.
The Minimum is Defined when the Tube has 65% of it's life left.
*TV-7A/U has been Refurbished and Calibrated by Dan Nelson.
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 Taped so Tubes do not Fall-Out of Boxes During Shipping.
Carefully Cut the Tape on the Pull Tabs to Open Boxes.
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 in Electrical Engineering before moving to Biological Engineering.
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 Recently Acquired AMPLITREX AT-1000.
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 combine shipping. The shipping calculator should work for this listing.
I don't require immediate payment. You can add items and I can invoice you with combined shipping.
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. :-)