Modification and information articles:
A Subaudible Tone Modulator for The TA-51, TA-144, and TA-220 Series Transmitters   by Kevin Custer  W3KKC
Alternate Audio Input for the TA-51, 144, and 220   Elimination of gain and filtering when using a Repeater Controller
Squelch Modification for the "R" Series Receivers   Reducing Squelch Hysteresis by Kevin Custer W3KKC
Add on S-Meter for the "R" Series Receivers   by Kevin Custer W3KKC
Frequency Stability in Hamtronics TA-451 UHF exciters   by Kevin Custer W3KKC
A Review of Hamtronics Synthesized T301 & R301 Exciter and Receiver   by Kevin Custer W3KKC
An Interesting Video Transmitter using the TA-451   The Design Of The Brookdale ATV Repeater System Exciter   (offsite link)
An Audio Frequency Response Modification for the Hamtronics TA-451 UHF Transmitter   By Brad Andrews KB9BPF

Manuals for most Hamtronics equipment are available directly from the Hamtronics.
Click here to view the list of available manuals on their server.

If you have an older manual that is not currently available from them, and you would like to donate it to the cause, please follow the link to Hamtronics at the top of this page and offer the manual to them. Send youe email to the attention of Jerry Vogt.

The manuals that were available here have been forwarded to Hamtronics by their request, and are now available from their website. The manuals available from the Hamtronics website (as of March 2008) include:

• A40 12Vdc Adapter
• AP3 Autopatch
• CA-(vhf) and CC-(uhf) Receiving Converters
• COR-3, COR-4 , COR-5 (REP-200) and COR-6 Modules
• Programming info for their original diode-matrix CWID Module
• CWID-2 Module
• DE-202 Data Demodulator and the 2400 Baud Mod for the DE-202 and MO-202
• DVR-1, DVR-3 (old and new style) and DVR-4 Digital Voice Recorders
• HRA, HRG-VHF and HRG-UHF Helical Resonator Amplifiers
• LNG-28, LNG-50, LNG-144, LNG-166, LNG-220, LNG-450 and LNG-800 Preamps
• LNK and LNK-WB (wideband) Preamps
• LNP Preselector
• LNW-28, LNW-50, LNW-100, LNW-144, LNW-160, LNW-220, LNW-450 and LNW-WB (wideband) Preamps
• LNY and LNY-WB (wideband) Preamps
• LPA2-15R, LPA2-25R, LPA2-40, LPA2-45, LPA4-10R, LPA4-35 and LPA6-25R amplifiers
• LPA 2-15R Linear Amplifier for 144 & 220 MHz
• MO-202 Data Modulator
• 2400 Baud Mod for MO-202
• MO-96 9600 Baud Data Modem
• R100 Receiver and the
• 9600 Baud Mod for R100, R451, R301, R304
• R121 Aircraft Receiver
• Wag Aero Fly By Night Receiver
• R139 Rev B and Rev C Receivers
• R144 Receiver (old and new style)
• R301, R302, R304, R305, R451, R901 Receivers
• 9600 Baud Mod for R901
• REP-200 Repeater
• REP-200N Repeater with No Controller
• RPA-30, RPA-302, RPA-40, RPA-402, RPA-45 and RPA-452
• RWWV Receiver
• RWX Receiver
• T301, T304 Exciters and T306 Data Exciter
• TA51 Exciter (silver colored top)
• TA51 Exciter Rev A (green colored top)
• TA451 Exciter
• 9600 Baud Mod for TA51 and TA451
• TB901 Exciter
• TD2 DTMF Decoder/Controller
• TD-3 CTCSS Decoder
• TD4 DTMF Decoder/Controller
• TD5 CTCSS Encoder/Decoder
• TD5 Wiring into the REP-200 Repeater
• XV2 and XV4 Transmitting Converters

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This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.