Stereo 20 bill of materials

Stereo 20 Component List

Here is a list of the original component values for the Leak Stereo 20 amplifier and the replacement equivalents I used during my restoration excercise. This component list is available as a spreadsheet saved in Excel 95 format on the download page.

Qty	Reference designator	Original part (All 1/2W except where shown)	Replacement part (All 1/2W except where shown, see note 2)
2	R1	1M	1M
2	R2	22K	22K
2	R3	2K2	2K2
2	R4	100R	100R
2	R5	100K	100K
2	R6	3M3	3M3
2	R7	91K	91K
2	R8	1K	1K
2	R9	22K, 1 Watt	22K
2	R10	100K, 1 Watt	100K
2	R11	3M3	3M3
2	R12	1M	1M
2	R13	1M	1M
2	R14	270R, 1 Watt	270R, 2 Watt (see note 1)
2	R15	270R, 1 Watt	270R, 2 Watt (see note 1)
2	R16	10K	10K
2	R17	10K	10K
2	R18	12K	12K
1	R19	47K	47K
1	R20	4K7	4K7
1	R21	100R, 3 Watt	100R, 3 Watt wirewound
2	C1	1nF, 400V	2 x 470pF, 630V in parallel
2	C2	50uF, 12V electrolytic	47uF, 25V electrolytic
2	C3	0,1uF, 350V	not replaced
2	C4	0,25uF, 350V	220nF, 450V
2	C5	0,02uF, 350V	22nF, 450V
2	C6	0,25uF, 350V	220nF, 450V
2	C7	50uF, 25V electrolytic	68uF, 50V electrolytic
2	C8	50uF, 25V electrolytic	68uF, 50V electrolytic
2	C9	200pF	not replaced
1	C10&C11	32uF-32uF, 400V dual capacitor	2 discreet 47uF, 450V capacitors (see note 2)
1	C12&C13	32uF-32uF, 400V dual capacitor	2 discreet 47uF, 450V capacitors (see note 2)
1	V1	ECC83,12AX7,B339	same as original
2	V2	ECC83,12AX7,B339	same as original
2	V3	EL84,N709,6BQ5	same as original
2	V4	EL84,N709,6BQ5	same as original
1	V5	GZ34,5AR4	GZ34,5AR4,GZ32,5U4G

Note1: The 1 watt resistors used in the original amplifier never really needed this power dissipation, and were all replaced with 1/2 watt'ers. R14 and R15 should only really be 1/2 watts but my supplier only had them in stock as 2 watt resistors. They look better anyway, which is probably why the original had the huge 1 watt resistors too !
Note 2: The capacitors were wired to provide the same electrical setup as the large canister caps which portrude through the chassis. The original caps were left in the chassis to not impact the external look of the amplifier.
For more info read the article on my restoration project.