WhitakerAudio 60 W Stereo Power Amplifier, Руководство пользователя и по сборке

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the PWB contains pads only for the active pins used on the socket. The heater connections
are made separately. The recommended procedure for installing the connecting wires is as
follows:
1) Feed a bare wire from the component side through the pad and into the socket
soldering tab.
2) Crimp in place (see Figure 5.2 b ).
3) From the component side, pull the wire tight and solder in place
4) Trim the excess lead length.
5) Solder the socket tab.
Table 5.2 shows the pins that should be connected to the PWB.
– Repeat the connection process for each PWB-to-socket connection, being careful to match
up the right pad on the board with the right connection on the socket. (See Figure 5.2 c .)
This is best done by starting at pin 1 on one side of the socket, and on pin 9 on the other
side.
Note: The lead lengths for the octal tube sockets vary from one vendor to another. The
procedure described above works well for sockets that, when mounted, allow at least 1/4-inch
clearance above the board. Some socket leads, on the other hand, extend almost to the PWB pads.
In this case, it is recommended that the following procedure be followed:
1) Cut 6 pieces of 2-inch long bare #22 wire. Attach a wire to each of the active pins on
the octal socket (all except for pins 2 and 7, the heater terminals) and solder.
2) Cut the wires in descending length from pin #1 to pin #8.
Table 5.2 PWB to Tube Socket Connections
Socket No. V1, 6U8A V2, 7027A V3, 7027A
Pin 1 yes yes yes
Pin 2 yes no, heater no, heater
Pin 3 yes yes yes
Pin 4 no, heater yes yes
Pin 5 no, heater yes yes
Pin 6 yes yes yes
Pin 7 yes no, heater no, heater
Pin 8 yes yes yes
Pin 9 yes