Update 11 June 2010

EU and UK add-on boards for FM rigs have been continuously available, but for some reason left off the web page.  These have now been included and the hyperlinks on the page simplified.

        Contents

        Receive Preamp, boxed, RP11S

        Speech Processor, boxed, SP1000

        Piptone, Kaytone, Tunetone & Hy Gain Bleep boards

        Spectra bleedover filter, SF10.7

        Noise squelch, NS1000

        Frequency mod-demod, FM455

        Speech Processor for Cybernet multimode, SP059

        VCO block for Cybernet multimode, VCO27

        EU and UK add-on boards for FM rigs       

        UK add-on boards for multimode rigs       

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RP11S RECEIVE PREAMP for 11metres, RF switched 0-20dB panel adjustable gain. Through power handling 100W. Over voltage and reverse voltage protected. Protected against static discharges at input and output ports. Purpose made box 76 x 70 x 38mm. Fitted with SO239 connectors. Operating supply 13.5V 80mA. Boxed Kit £35.00, Boxed Built £57.00.

SP1000 SPEECH PROCESSOR to increase the sideband power and hence communications effectiveness of SSB and AM ransmissions. The unit has a frequency response which enhances the higher voice tones which carry most of the intelligibility. The peak to mean ratio of the transmission is improved by 10dB which has the same effect as increasing the transmit power by 10 times. Boxed Kit £42.50, Boxed Built £60.00.

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Bleep Boards

PT1000S PIPTONE Roger Bleep. The unit provides 50mV across a 600 ohm microphone. Tone frequency and amplitude are pre-settable. A relay is included for loudspeaker and PTT switching. PCB size 44 x 25 x 17mm. PCB Kit £8.00, PCB Built £12.00.

KT2000 KAYTONE Bleep (a name coined by Spectrum), this unit is the successor to the original Kaytone sold in 1979. End of message morse K particularly useful for weak signal situations. Adjustable pitch, speed, and level. A relay is included for TX and RX switching making it suitable for all rigs. PCB size 58 x 39 x 15mm.   PCB Kit £11.50, PCB Built £18.00.

TT2000 TUNETONE Bleep. Musical end of message signal with nine individually selectable notes. Adjustable pitch, level, and speed. With relay switching to make it suitable for all commonly available rigs. PCB Kit £13.50, PCB Built £22.00.

HG2000 HYGAIN BLEEP  A board designed to mimic the sound made by the bleep unit in the Hy Gain 5 multimode rig. Adjustable speed and level.  With relay switching to make it suitable for all comonly available rigs.  PCB kit £12.50, PCB Built £20.00.

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NS1000 NOISE SQUELCH a really effective cure for all the annoying background noise produced by FM receivers. Allows reception of weak signals without loss of any except those which would have been unreadable anyway. Particularly useful for homebase use where its performance like that of AM is less annoying.        PCB Kit £13.00, PCB Built £18.50.

SF10.7 SPECTRA FILTER active filter incorporating a 2 pole crystal filter to replace the 10.7MHz ceramic first IF filter in early CB radios. The effect is to reduce bleedover by about 90% and by being active does not cause loss of sensitivity of the rig. PCB size 36 x 20 x17mm. PCB Kit £7.00, Built £9.25.

FM455 FREQUENCY MOD-DEMOD adds very good quality FM transmission and reception to AM only CB rigs. Receive side connects to the last IF amplifier before the AM detector. The transmit side connects directly to the microphone input and provides processed audio to the varicap diode in the PLL circuit. PCB size 44 x 39 x 16mm. PCB Kit £10.00, PCB Built £15.00.

SP059 SPEECH PROCESSOR for Cybernet multimode rigs. Specially designed to overcome poor quality audio on PTBM059 & PTBM121 chassis. The board picks up the audio drive to the VCO processes it and then feeds an add-on varicap board. PCB size 40 x 20 x 15mm. PCB Kit £7.50. PCB Built £11.00.

VCO27 VCO BLOCK for Cybernet multimode rigs to allow conversion for 10 metres or to allow the rig to accomodate extra channels such as UK81. Type for CB bands VCO27, for 10 metre band VCO28. Built £7.50.

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EU and UK add-on boards for FM rigs

SC26L SYNTHESISER CONVERSION to add EU band to UK rigs which use the LC7137 PLL IC. PCB Kit £17.50, PCB Built £22.50.

SC26A SYNTHESISER CONVERSION to add EU to UK Amstrad rigs which use the LC7136 or LC7137 PLL IC. PCBKit £17.50, PCB Built £22.50.

SC26T SYNTHESISER CONVERSION to add EU to UK UNIDEN and AUDIOLINE rigs which use the TC9119P PLL IC. PCBKit £17.50, PCB Built £22.50.

SC27L SYNTHESISER CONVERSION to add UK to EU rigs which use the LC7132 PLL IC. PCBKit £17.50, PCB Built £22.50.

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UK add-on boards for multimode rigs

SC02A SYNTHESIZER CONVERSION, eprom board for adding UK81 to Cybernet multimode rigs. PCB size 40 x 30 x 10mm.  PCB Kit £13.50, PCB Built £15.00.

SC02B SYNTHESIZER CONVERSION, adds UK81 and 40 below the existing low band to Cybernet multimode rigs. To achieve this spread of channels a replacement VCO block VCO27 will probably be required. PCB size 40 x 30 x 10mm. PCB Kit £13.50, PCB Built £15.00.

SC02C SYNTHESIZER CONVERSION, adds  UK81 to Cybernet AM/FM rigs. PCB size 40 x 30 x 10mm. PCB Kit £13.50, PCB Built £15.00.

SC106 SYNTHESIZER CONVERSION, adds UK81 to Uniden multimode rigs, Stalker 9, Cobra 148GTL DX, Superstar 360, Maddison, Jackson, State rig type when ordering. PCB size 40 x 30 x 10mm. PCB Kit £13.50, PCB Built £15.00.

SC3900 SYNTHESIZER CONVERSION, adds UK81 to Superstar 3900 and Galaxy Pluto rigs. PCB size 50 x 40 x 10mm.  PCB Kit £15.00, PCB Built £16.50.

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