Hamtronics Information Index

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Maintained by Kevin Custer W3KKC

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 by Kevin Custer W3KKC
Elimination of gain and filtering when using a repeater controller

Squelch Modification for the "R" Series Receivers by Kevin Custer W3KKC
Reducing squelch hysteresis

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 and 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

An Audio Frequency Response Modification for the Hamtronics TA-451 UHF Transmitter By Brad Andrews KB9BPF

PTT Modification for Synthesized Exciters and Transmitters By Robert Meister WA1MIK
Specifically for the T304, but it should work on other Hamtronics synthesized units.

10 and 11 position DIP switch settings for Synthesized Receivers and Transmitters from the Hamtronics web site
Applies to those units with 5 kHz synthesizer steps (i.e. all but aircraft band).

R121 & R122 Aircraft Receiver DIP switch settings from the Hamtronics web site
Applies to those units with 25 kHz synthesizer steps starting at 118.0 MHz.

R123 & R317 Aircraft Receiver DIP switch settings from the Hamtronics web site
Applies to those units with 25 kHz synthesizer steps starting at 120.0 MHz.

Skipp is offering EEPROM and related product information (and support) for all of their products, specifically programming the EPROM chips used in the COR-4 and COR-5 and REP-200 Repeater Controller. Contact him directly at: skipp025 [ at ] yahoo [ dot ] com.

The Hamtronics web site is gone. PDF versions of manuals for their products can be acquired here for files obtained during 2012. Check this repository first. If you don't find something, check this more recent repository of manuals acquired later for files obtained prior to 2017, or files that have been added, corrected, or improved since then.

Hamtronics® is a registered trademark of Hamtronics Inc.

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This page originally posted on October 14 2004

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.

	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 by Kevin Custer W3KKC Elimination of gain and filtering when using a repeater controller
	Squelch Modification for the "R" Series Receivers by Kevin Custer W3KKC Reducing squelch hysteresis
	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 and 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
	An Audio Frequency Response Modification for the Hamtronics TA-451 UHF Transmitter By Brad Andrews KB9BPF
	PTT Modification for Synthesized Exciters and Transmitters By Robert Meister WA1MIK Specifically for the T304, but it should work on other Hamtronics synthesized units.
	10 and 11 position DIP switch settings for Synthesized Receivers and Transmitters from the Hamtronics web site Applies to those units with 5 kHz synthesizer steps (i.e. all but aircraft band).
	R121 & R122 Aircraft Receiver DIP switch settings from the Hamtronics web site Applies to those units with 25 kHz synthesizer steps starting at 118.0 MHz.
	R123 & R317 Aircraft Receiver DIP switch settings from the Hamtronics web site Applies to those units with 25 kHz synthesizer steps starting at 120.0 MHz.
	Skipp is offering EEPROM and related product information (and support) for all of their products, specifically programming the EPROM chips used in the COR-4 and COR-5 and REP-200 Repeater Controller. Contact him directly at: skipp025 [ at ] yahoo [ dot ] com.