supplying an RF gasket and metal inserts to replace the rear panel nylon inserts to
correct an RF leakage problem from the back of the HW-101 during transmit.
This has been generating numerous phone calls to Technical Consultation from
customers wanting the modification parts; whether they have RF leakage problems or
not.
Currently, Heath does not offer such a modification for the HW-101 since Tech
Consultation or Engineering has no evidence of any severe RF leakage problems.
If you discover that an HW-101 has rear panel RF leakage while you are servicing it,
you can correct it by connecting a three inch length of brain [PN 345-1] between two
solder lugs [PN 259-1] and mounting it on the rear cabinet top and rear panel on the
transceiver. Be sure to sand the area around the solder lug on the cabinet top. Refer to
the pictorial below.
[[Pictorial shows the 3" braid as stated above - connected in the center of the rear
flange of the top cover to the middle of the rear back plane of the chassis]]
Perform this modification on an "as-needed" basis and only if standard servicing
procedures do not correct; re:, lockwashers between the RF driver board and chassis,
tube shields at V6 and V7, all hardware tightened.
ah.1.65. HW-101-61: Parasitic Oscillations
JUNE 20, 1980
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-61
Parasitic oscillations occurring in the HW-101 may be caused by excessive component
lead length. The leads of the components installed on V8 and V9 tube sockets should
be kept to a minimum and dressed as shown in the pictorials below.
[[Pictorials indicate a direct-path method of interconnectivity, keeping component
lengths at their minimum]].
ah.1.66. HW-101-62: Phase Shift Circuit Board Parts List
JUNE 20, 1980
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-62
The following components are being used to replace the PEC [PN 84-22] at V15A in the
current production run of the HW-101. This list is intended as a quick reference when
servicing the newer transceivers. Continue ordering [PN 84-22] if the PEC must be
replaced on older units (re: Bulletin No. HW-101-48).
Circuit Comp. No. Description Heath Part No.
HW-101 Service Bulletins Page 153
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