Pa4den manual

The frequency of the square wave is a several times higher than the sine wave itself, this makes filtering very easy. For this modification are 2 to 4 ROM chips nescesary.

The EPROM in the display unit has to be replaced, this is a small program which does nothing else than printing the data from the FM to the display and sending the last pressed key to the FM The SMD components at the red circles have to be removed. At the top, left, a resistor of 22k, and on the right a 1k resistor. The green squares are indicating the wires to cut. The squelch may be remain closed until a valid ZVEI 5-tone code is received. It is also possible to.

The tone squelch is activated by pressing the E key. When receiving, the yellow LED lights. When transmitting, the symbol 'T' appears behind the frequency. Now set the tone for the squelch. The tone code has to be entered using the number keys.

If a number flashes, this indicates a DTMF tone. The frequency of the tone burst may be adjusted in the Audio menu. Confirm your selection by pressing any other key. Up to favourite channels per bank may be pre-set in the transceiver. A channel is stored as follows:. This is replaced. It is very useful, particularly in mobiles, to have a single button available to retrieve the Priority Channel.

The Priority Channel frequency may be programmed as follows:. Names may be assigned to memory channels. The displaying of the name may be switched on and off, as follows:.

Text entry using the keys on the keypad is largely similar to the method used on GSM phones. For example, the letters A, B and C are 'behind' the. The desired letter or character is selected by repeatedly pressing a number key.

It has a Z80 processor inside the control head. Some new old stock units have been acquired by hams in Finland. This one is the earlier KG trunked version with the Fylde Microsystems processor board. A batch of "new old stock" units has also been sold to radio amateurs. If you have any info, please tell us. Some of you may also have spotted a KG playing a very important part in the movie "Police Academy 4". We may be able to add other bands 2 metres and MHz if somebody supplies us at least the schematics.

Please contact us if you have information to share. Many aftermarket battery companies have packs for KG Try Google Search for other sources. Also Key Radio Systems sell new battery packs for the radio. Please remember not to connect either of the speaker wires to the chassis if you use KG e. This one has also the processor board made by Kyodo. The ham firmware is in the works and will be available here some day.

Sorry, no ham firmware yet, but these beauties are certainly worth taking. The user interface is a bit awkward, though. This radio looks like a Mobira Talkman cellular transportable. The only thing in common between the Talkman and ActionMan series, however, are the case and handset mechanics.

Most of the units have appeared under the well-known brand Nokia but some very early ones carry the original Mobira legend on the handset. This is one of the radios you must have.

It has a wideband receiver that covers all public frequencies and it runs hours without an external DC source with the piggyback 3 Ah or 6 Ah gel cell battery. The car kit has provision for an external PTT and a goose neck or sunvisor microphone. All units are rated for 15 W key down, even battery powered. It is also your personal repeater just by a flip of a software switch. What we know of, RC58 radios have been delivered e.

RD58 radios can be found anywhere, e. The simplex units are very easy to modify, you'll only have to install the ham firmware EPROM and configure the set with the keypad. It is also recommended that in the UHF versions RD58 a true noise squelch board is installed, at least when the radio is used in a hostile RF environment.

Computec RB is a Mobitex mobile unit with a different processor board. There are both 80 MHz and MHz versions available. Unlike the earlier repeater firmware, it works with both processor boards. The NMT versions make an excellent 70 cm rig which also behaves very well on bps packet. Beware that when aligning the SE it is necessary to re-assemble the set outside its case, and without the PCB guide slots on the inside of the case, it is all too easy to mis-align either of the two sets of edge-connectors when connecting the two boards together.

Mis-connection of these can produce all sorts of weird errors, and may even cause permanent damage to the set. Note that if the back-up battery is not fitted, this setting will have to be made each time the set is powered up. Many users have found that as the set is turned on, the receiver audio is too loud for use in a quiet room.