SB-620 coils Part II

[myname]

Well it took exactly 12 minutes to get my first 2 requests for the rest of
the dope for the SB-620 coils.  So -- here goes



P/N 774 (must have been from earlier production):

Range: ( uH) 2.60(max) to 5.0 (min)
Preset:  3.5 ±10% @ 7.9 MHz.
"Q": minimum @ 7.9 MHz.: 85 measured with 2 1/4" leads to Q-meter
Min. wire size: #30
Wire type: SPTH S. Cel.
No. of turns:  19 1/2
% of total turns from start to tap:  37%
Viewed from above (screw adj. end):
Start: lug #3 @ 6 o'clock
Tap: lug #2 @ 9 o'clock
Finish: lug #1 @ 12 o'clock
Dummy: lug #4 @ 3 o'clock
Winding: Clockwise
Staple lugs not to protrude inside coil form
Form to withstand 1000 VAC terminals to core
Must snap into 5/16" hole in 14 ga. aluminum

P/N 807:

Range: ( uH) 3.8 (max) to 7 (min)
Preset:  4.8 ±10% @ 7.9 MHz.
"Q": minimum @ 7.9 MHz.: 70 measured with 2 1/4" leads to Q-meter
Min. wire size: #38
Wire type: S. Cel. Poly.
No. of turns:  Universal 18 1/2
 Turns from start to tap:  6 1/4
Viewed from above (screw adj. end):
Start: lug #3 @ 6 o'clock
Tap: lug #2 @ 9 o'clock
Finish: lug #1 @ 12 o'clock
Dummy: lug #4 @ 3 o'clock
Winding: Clockwise
Staple lugs not to protrude inside coil form
Form to withstand 1000 VAC terminals to core
Must snap into 5/16" hole in 14 ga. aluminum

and P/N 808:

Range: ( uH) 27(max) to 56 (min)
Preset:  44±10% @ 2.5 MHz.
"Q": minimum @ 2.5 MHz 60 measured with 2 1/4" leads to Q-meter
Min. wire size: #38
Wire type: S. Cel. Poly.
No. of turns:  Universal 57 1/2
 Turns from start to tap:  16 1/4
Viewed from above (screw adj. end):
Start: lug #3 @ 6 o'clock
Tap: lug #2 @ 9 o'clock
Finish: lug #1 @ 12 o'clock
Dummy: lug #4 @ 3 o'clock
Winding: Clockwise
Staple lugs not to protrude inside coil form
Form to withstand 1000 VAC terminals to core
Must snap into 5/16" hole in 14 ga. aluminum

FWIW, the coil forms vary between 1 1/4" and 1 1/2" in length.

You guys please keep the list informed of any breakthroughs.

Tnx,
Tom

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