These products should be ordered from Ten-Tec Service as replacement parts.
PTO Rebuild Kit with instructions for all PTO based transceivers:
$35.00 plus $6.00 shipping and handling:
Please state model number of the transceiver when ordering.
Dial string kit for all analog transceivers, 229, 4229 and 238 tuners.
$1.50 plus $3.00 shipping and handling. Please state model number when placing an order.
Hand held dynamic microphone for all early Ten-Tec transceivers. This microphone will work with all transceivers that have a 1/4 inch stereo microphone jack.
$30.00 plus $6.00 shipping and handling

Specifications:

Directivity: Omni-Directional
Impedance: 500 ohm (+/- 30%)
Sensitivity (0dB=1V/ubar): -72 +/-4dB
Frequency Response: 200Hz-5 KHz
© 2009 Ten-Tec, Inc.