Matched pair or NOS (new old stock un-used) Amperex Bugle Boy EL84/6BQ5s.
These have matching 1963 date codes (1st week of april 1963) and matching batch
codes on the glass (5-21.) They are both rx4 construction and came from the
Heerlen Holland plant. These appear to have never been used. One box lid is
present but torn (fell off upon first opening.)
Both have been tested on my restored and recently calibrated Teiplett 3444.
Each tube measured 10,000 mho @ 36ma.
NOTE ON TUBE TESTERS: results fluctuate somewhat between brands/types. A
Triplett test might not match an Hickok test exactly and vice versa. Triplett
tests tubes at 250v-275v with separate screen taps and a 1khz variable grid
drive signal. This makes it a more accurate real world tester than many other
famous testers. Bid with cinfidence but also understand that results may vary
slightly from tester-to-tester within a reasonable margin of error.
All tubes will be shipped USPS priority with insurance over $50. Check our
other listings for more amazing rare audiophile, hi-fi and guitar amp tubes!