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Syntor® Frequency PROM to EPROM/EEPROM adapters and kits.

USEFUL FOR PROM REPLACEMENT:

This adapter can be used simply to allow the replacement of the Syntor® frequency PROM (obsolete, hard to find, expensive when found, and can not be re-programmed) with an EPROM or EEPROM, with no change in the number of channels available, etc. In this case, use of the adapter is 100% compatible with all the normal Motorola Syntor® control heads, accessories and cables. The Syntor® can be programmed for up to 32 channels when used with standard Motorola control heads and accessories.

USEFUL FOR EXPANDING THE NUMBER OF CHANNELS AVAILABLE:

This adapter can also be used to expand the number of channels which can be "programmed" into the Syntor® radio.

It is fairly easy to modify a 16 channel control head, expanding the concept of the talkaround switch used in the normal 32 channel control head to a "bank" switch, so that up to 16 banks of 16 channels each are available. This arrangement provides the Syntor® radio with up to 256 channels selectable via the control head and bank switch. The bank switch can be conveniently mounted close to the control head. Minor modifications to the Syntor® radio (besides the addition of the PROM to EPROM adapter) are necessary to use the adapter with more than 32 channels.

The bank switch concept is also applicable to 4 and 8 channel radios (i.e. radios using 4 or 8 channel control heads), but is more difficult to implement.

The bank switch concept can also be expanded so that more than 256 channels can be accommodated.

COMPATIBLE WITH A LARGE VARIETY OF EPROMS AND EEPROMS:

This adapter was designed to be very flexible and can be used with a large variety of EPROMs (including all 2716 through 27512 varieties) and EEPROMs (including 2804 thru 28256 varieties). It will work with most 24 or 28 pin EPROMs or EEPROMs. Not all devices will provide the full 256 channels. The capacity of smaller EPROMs or EEPROMs is not adequate for 256 channels so the channel capability reflects the size of the device used. To obtain 256 channel capacity a 2732 or larger EPROM is necessary.

It accommodates the large variety of devices by means of a few jumper wires. These jumpers are wired to match the desired EPROM or EEPROM and to replace the bank switching wiring (or portions of it) when it is not needed (i.e. when less than 256 channels is adequate).

If 256 channels is not enough, it is easy to make some very minor modifications to the adapter which permit up to 2048 channels to be used (but which must be kept within the tuning range of the radio if full performance is desired).

USER MANUAL:

A user manual for the Syntor PROM to EPROM/EEPROM adapter can be downloaded here. Download the Syntor PROM Adapter User Manual.

AVAILABLE SOFTWARE:

Software is available that allows you to easily generate the frequency PROM data needed to program the various EPROMs, and EEPROMs that can be used with this adapter. The software can also be used with normal Syntor® PROMs. The generated data is placed into standard Intel HEX files so that the PROMs, EPROMs and EEPROMs can be programmed with nearly any PROM/EPROM/EEPROM programmer that is compatible with the PROMs (etc.) to be used. Programming services are also available from us for those who don't have access to a suitable programmer.

KITS AND ASSEMBLED ADAPTERS:

Bare circuit boards, adapter parts kits, and assembled adapters are available. Information on how to "Home Brew" your own adapter.

Pricing is as follows:

Notes: Assembled adapters DO HAVE the few small jumpers used to customize the adapter to the EPROM or EEPROM that will be used. They DO NOT have the optional bank select wiring (shown in the photos) as this would have to be removed when the bank selection feature is not desired. No EPROM or EEPROM is supplied with the adapter or adapter parts kit. If you specify the EPROM or EEPROM that you want to use, the "customize" jumpers will be installed to match your specification -- if you don't specify a device, the adapter will be wired to work with 2764 / 27128 (either will work) devices. NOTE: Assembled adapters are carefully wired, but are NOT INDIVIDUALLY TESTED.

HOW TO ORDER:

You can order by e-mail or regular mail. Send your e-mail orders to me using the "contact us" link on the home page. Send your regular mail orders to me at the address obtained using the "about Ries Labs" link on the home page. You can pay using PayPal, which is the fastest way and allows you to use a variety of payment options, including credit cards. You can also pay using USPS money orders, bank money orders, or bank checks (cashier's, etc.). Be sure to make your payment payable to Roger P. Ries. It is a good idea to specify the type of EPROM or EEPROM you will be using with your adapter -- so I can wire up your adapter with the necessary jumpering to match. You can also order EPROMs from the list below.

Be sure to Download the user manual. It has all the information needed to assemble this adapter, and also much information on how to use it, etc.

EPROMs available:

You can order EPROMs for your adapter from the list below. Both NEW and USED EPROMs are available.

VIEWS OF THE EPROM/EEPROM ADAPTER:

Top view of the adapter.

Side view of the completed adapter. Note that the PROM socket is not centered under the EPROM socket. This is necessary so that the completed adapter will fit into the available space inside the Syntor® radio. NOTE: The wires shown above and below are for bank switching (when more than 32 channels are desired) and are NOT NORMALLY INCLUDED with the adapter (but can be included by request when ordering).

Bottom view of the adapter.

Note: Syntor® is a registered trademark of Motorola, Inc.

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