Upd May 2011 / 28th June 2011 / 12th August 2011

May 2011 Update
New Updates are availabe covering the following subjects:

- RFA without plastic threaded rod
- Improvement of the RFA at high power
- Improvement of the Varylink coupling

To obtain the updates, send email with the following info:
- Name, Callsign and date of receiption of construction guide

All updates are recommended, also for lower power operation
   
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Addition 28th.June 2011 as interim Update

New source for Motor of the RFA =  cheaper, smaller, and lighter
(using the same circuit, however adjust the output to 6V)

COPAL HG16 (30:1), 6V, 25grams ,  41mm long, 16mm dia  at 7.50 Euros
 
bei http://www.voti.nl/shop/catalog.html 
or
PGM 16/62 (62:1), 6V,   50mm long, 16mm dia  at 11.50 Euros
 
bei http://www.anghuber.de   

and order the following parts at www.voti.nl for the control box of the RFA:
- Transistor TIP122 (instead of BDX33C)
- Toggle Switch SW-12 (2 x um) not SW-02, must be double pole!
- Pushbutton switch SW-17 (push to make)