Re: [Repeater-Builder] -- New Product Announcement from Repeater Builder --
put me down as a customer Kevin Custer wrote: Hi All, You may remember the thread on audio quality a while back. One topic was a replacement module for the stock audio processing circuitry which is a major cause of limited audio bandwidth from some manufacturers and models of equipment used to build repeaters and links from. Some time ago, a prototype boards were built, sold and tested to finalize the hardware design and verify circuit performance of this new Audio Processing concept. I am happy to announce the revised edition of the Audio Processor (clipper/filter) module from Repeater Builder. We are tentatively calling it the AP-50 The new product is mostly surface mount to minimize size and allow an installation concept similar to the Com-Spec TS-64. The product can be used stand alone in existing repeater/link applications, or, available as an option for use directly with modern repeater controllers. The Arcom RC-810 is one such product that will accommodate the RB module to allow infinitely adjustable audio processing, per port. If you haven't heard about the Arcom RC-810, don't worry, you will. We are working with an American board house and hope to have available product for Dayton 2005. Details on the AP-50: Description: This is a Audio Processing Module to replace the Blob or stock clipper/filter sections in Two-Way FM radio transmitters. While this circuitry was designed for use in a repeater or repeater controller, it could be used to feed a modulator directly from a discriminator source like in cross band repeaters or links. The module has 3 controls for setting the amount of clipping (processing), the cut-off frequency of the low pass filter (bandwidth), and the amount of deviation. The module also has jumpers to 'program' the type of audio feeding the module, and what feeds the modulator. The jumpers allow either pre-emphasized or normal audio to feed the clipper, and allow either de-emphasized or normal audio output to feed the modulator; which accommodates either a FM or PM exciter to be properly modulated. The low pass filter has an elliptic response created by a switched capacitor filter to provide 'brick-wall' filtering. The cut-off frequency is set by adjusting a potentiometer. The approximate cut-off range is between 2500 and 5500 Hz to accommodate anything from 15 KHz spaced 2 meter pairs to 25 KHz spaced link or auxiliary allocations. The module is capacitively coupled with 10 uF Non Polarized capacitors on the input and output to ensure low frequency response. The module has a 5 pin header to allow either a connectorized cord for stand alone installations, or be plugged directly onto a option connector in supporting repeater controllers. The module has a dedicated PL or CTCSS input after the processor to insure proper low distortion modulation of PL tones. This input is DC coupled and can be driven directly by modern CTCSS/PL modules like the Com-Spec TS-64. Concept: The module is used to process audio feeding a FM or PM modulated transmitter. Many times the stock audio processing (clipper/filter) section of a transmitter can limit the audio bandwidth of the system. By using this module, a set-able frequency bandwidth is obtained in addition to amplitude limiting. A custom integrated circuit is used to do most of the processing, including amplitude limiting and set-able frequency filtering. The custom chip is provided voltage from an on-board regulator to ensure stable operation. A second integrated circuit op-amp is used to buffer the output of the custom chip to drive low impedance modulators directly. Specifications: Power Source +11 to +16 VDC Board is Reverse Polarity Protected LPF Cutoff Frequency - 2500 to 5500 Hz. Frequency Response Less than 50 Hz. to 90% of Fc - +/- .25 dB Typical Minimum Audio Input Level 200 mV P-P Input Impedance approximately 10 K ohms Output Impedance approximately 100 ohms Maximum Audio Output Level 8 Volts P-P LPF Rolloff -30 dB at 144% of Fc Very Low Distortion and Group Delay Features: Brick Wall Filtering Dedicated PL Tone Input Wide Frequency Response, great for Flat Audio repeaters and links, or standard ones Low Power Consumption Adjustable Clip Level (level of process), LP Filter Cut-Off (audio bandwidth), and Deviation Level (loudness) Small Size (about 1.2 X 1.8 inches) Simple to hook-up and set-up Board is reverse polarity protected Stay tuned for more information on this new exciting product from Repeater Builder. Repeater Builder (the company) is a subsidiary of Zimmerman Electronics Kevin Custer - M. Scott Zimmerman Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe
Re: [Repeater-Builder] -- New Product Announcement from Repeater Builder --
James wrote: put me down as a customer Hi James, Here is the latest on the AP-50. http://www.repeater-builder.com/products/ap-50.html Kevin Custer Kevin Custer wrote: Hi All, You may remember the thread on audio quality a while back. One topic was a replacement module for the stock audio processing circuitry which is a major cause of limited audio bandwidth from some manufacturers and models of equipment used to build repeaters and links from. Some time ago, prototype boards were built, sold and tested to finalize the hardware design and verify circuit performance of this new Audio Processing concept. I am happy to announce the revised edition of the Audio Processor (clipper/filter) module from Repeater Builder. We are tentatively calling it the AP-50 Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] -- New Product Announcement from Repeater Builder --
Hi All, You may remember the thread on audio quality a while back. One topic was a replacement module for the stock audio processing circuitry which is a major cause of limited audio bandwidth from some manufacturers and models of equipment used to build repeaters and links from. Some time ago, a prototype boards were built, sold and tested to finalize the hardware design and verify circuit performance of this new Audio Processing concept. I am happy to announce the revised edition of the Audio Processor (clipper/filter) module from Repeater Builder. We are tentatively calling it the AP-50 The new product is mostly surface mount to minimize size and allow an installation concept similar to the Com-Spec TS-64. The product can be used stand alone in existing repeater/link applications, or, available as an option for use directly with modern repeater controllers. The Arcom RC-810 is one such product that will accommodate the RB module to allow infinitely adjustable audio processing, per port. If you haven't heard about the Arcom RC-810, don't worry, you will. We are working with an American board house and hope to have available product for Dayton 2005. Details on the AP-50: Description: This is a Audio Processing Module to replace the "Blob" or stock clipper/filter sections in Two-Way FM radio transmitters. While this circuitry was designed for use in a repeater or repeater controller, it could be used to feed a modulator directly from a discriminator source like in cross band repeaters or links. The module has 3 controls for setting the amount of clipping (processing), the cut-off frequency of the low pass filter (bandwidth), and the amount of deviation. The module also has jumpers to 'program' the type of audio feeding the module, and what feeds the modulator. The jumpers allow either pre-emphasized or normal audio to feed the clipper, and allow either de-emphasized or normal audio output to feed the modulator; which accommodates either a FM or PM exciter to be properly modulated. The low pass filter has an elliptic response created by a switched capacitor filter to provide 'brick-wall' filtering. The cut-off frequency is set by adjusting a potentiometer. The approximate cut-off range is between 2500 and 5500 Hz to accommodate anything from 15 KHz spaced 2 meter pairs to 25 KHz spaced link or auxiliary allocations. The module is capacitively coupled with 10 uF Non Polarized capacitors on the input and output to ensure low frequency response. The module has a 5 pin header to allow either a connectorized cord for stand alone installations, or be plugged directly onto a option connector in supporting repeater controllers. The module has a dedicated PL or CTCSS input after the processor to insure proper low distortion modulation of "PL" tones. This input is DC coupled and can be driven directly by modern CTCSS/PL modules like the Com-Spec TS-64. Concept: The module is used to process audio feeding a FM or PM modulated transmitter. Many times the stock audio processing (clipper/filter) section of a transmitter can limit the audio bandwidth of the system. By using this module, a set-able frequency bandwidth is obtained in addition to amplitude limiting. A custom integrated circuit is used to do most of the processing, including amplitude limiting and set-able frequency filtering. The custom chip is provided voltage from an on-board regulator to ensure stable operation. A second integrated circuit op-amp is used to buffer the output of the custom chip to drive low impedance modulators directly. Specifications: Power Source +11 to +16 VDC Board is Reverse Polarity Protected LPF Cutoff Frequency - 2500 to 5500 Hz. Frequency Response Less than 50 Hz. to 90% of Fc - +/- .25 dB Typical Minimum Audio Input Level 200 mV P-P Input Impedance approximately 10 K ohms Output Impedance approximately 100 ohms Maximum Audio Output Level 8 Volts P-P LPF Rolloff -30 dB at 144% of Fc Very Low Distortion and Group Delay Features: Brick Wall Filtering Dedicated PL Tone Input Wide Frequency Response, great for "Flat Audio" repeaters and links, or standard ones Low Power Consumption Adjustable Clip Level (level of process), LP Filter Cut-Off (audio bandwidth), and Deviation Level (loudness) Small Size (about 1.2 X 1.8 inches) Simple to hook-up and set-up Board is reverse polarity protected Stay tuned for more information on this new exciting product from Repeater Builder. Repeater Builder (the company) is a subsidiary of Zimmerman Electronics Kevin Custer - M. Scott Zimmerman Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
