* Tunable control or ' Crystal control at the

* Interchangeable crystals within band coverage!

* FET oscillator.

The Most VERSATILE Converter: for more than one band coverage add models in series, X and SC line, then use one squelch for noiseless monitoring on all! Economy!

9 volt battery powered. *From 12 volts with BE85

* 3 transistors. * Squelch as accessory.

For: Model: Coverage:

VHF weather etc. . 1564X 150-164 mcs. ONLY

Aircraft, towers 1828X 118^128 mcs. $32-95 e*ch

2 Meters 1450X 144 148 mcs, (less crystals)

BE85 Battery eliminator 9 to 12 volts Zener reg S4.95


* Built in SQUELCH!

* 2 selectable frequen- jiTuJ cies! v "J

- Both Crystal controlled!

* 12 volt powered.

The perfect solution for low cost noiseless recep* tion for any 1 or 2 frequencies between 26 to 175 mcs. Frequencies must be within 3% of each other. Complete with mount, coax, crystals as ordered, and instructions,

+ Fully adjustable squelch * 4V* x 2 x 3 inches.

* Crystals interchangeable in preset range '5 transistors

Please state Exact Listening Frequencies!

PRO with one crystal, complete $39.95

PRO with two crystals, complete $44.95

COUPLING Loop and Extension antenna for usine all Tunaverters with home and transistor radios - - S3.95 EACH!

Prepaid orders postpaid.

See your dealer or order from:

Marketing DiVtsion of rompions Radio Products

Woodsboro4 F Texas 78393


Marketing DiVtsion of rompions Radio Products

Woodsboro4 F Texas 78393

Ext ra SO.80 each for airmail. 2 Week Money back guarantee!

Martín J. Feeney, Jr., KIOYB 515 Central Avenue ihcatwn of Mi View CaUi-94040

Many DX contacts on the VHF bands are missed because of (he lack of CW activity his dearth of CW is usually due either to unwillingness on the part of the operator to give it a try, or because many rigs, commercial and homebrew, just don't have provision for CW operation, even in this age of enlightenment- To convince the former 1 can only cite my 1250 mile QSO with W4MNT, Orlando, Florida, During this QSO I was running 70 watts, CW. I daresay this would have been difficult, if not impossible, using any other mode.

The transmitter I modified was the Tecraft TR-20, 220 MHz rig. However, the same approach can be used on many other rigs. The parts required are a DPDT toggle switch, closed circuit key jack, 7 pin miniature tube socket, .001 mF disc ceramic capacitor, OA2 VR tube, and a 15K, 10 watt adjustable resistor Inspection of the chassis and the photographs will show the location of the components. The only critical point is to position the key jack as near as possible to the cathode pin (pin 2) of the final 6360* The 'hone-CW switch is wired so that in the Phone position the rig operates normally; in the CW position the modulation transformer secondary is shorted and the cathode circuit of the 6AQ5 modulators is opened- One part of the DPDT switch, closed in the CW position, is wired across the modulation transformer secondary. The other section is used to open the modulator circuit. This section should be open in the CW position. Unsolder the 180 ohm cathode resistor from pin 2 of the 6AQ5Y Run a wire from pin 2 of the 6AQ5's to the switch.

and run another lead to the disconnected end of the cathode resistor Tape all exposed joints-

Mount the VR tube socket and connect one end of the 15k resistor to pin 5; connect the other end of the resistor to the B+ pin on the power plug. Ground pin 2 of the VR tube socket. Replace the 6AU6 oscillator screen resistor, connected to pin 6, with a 1000 ohm, Vi watt unit. Connect one end of the resistor to pin 6 of the 6AU6 socket, and the other end to pin 5 of the VR tube socket. This will stabilize the osciltaior stage, and prevent FM on Phone, and chirp on CW.

Next, mount ihe key jack. Wire it so that it is closed with the key out. Then unsolder pin 2 of the 6360 final stage. This is easier said than done, and may require temporary removal of oilier components in the area. If you are unfortunate enough to break off the pin in the process, as 1 was, remove the remains and replace it with a pin from oscillator

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