GWS tx and Aerohawk all in one rx conversion 72Mhz to 35Mhz

[peterbennett26]

What would I need to do to get tx and the rx on to 35 Mhz from 72Mhz?

From my digging I think I would need to change the front end of the rx to accept 35 Mhz, then the beating crystal which gives the IF would need to be changed.

The transmitter mixes the pulsing signal for the controls with the rf and the signal is amplified and kept pure by coils etc.




Does anybody have a schematic for a GWS/smartech 4 channel FM tx, or link to something desined upon similar lines?

[clipclop]

Peter,
there is a lot that will need changeing and tuneing . Capacitors and coils in both RX and Tx will have to be changed for different value components , and then the end result is most likely illegal to use .
To be legally able to use the changed setup you would have to submit it for testing by an approved authority and submit the results to your govening body for final approval with no guarantees it will be approved .
Not worth it in my oppinion .
Stewart

[peterbennett26]

Stewart,



Would holding a UK amateur Class B HAM radio licence get around the submission aspect? In this hobby in the UK you can build and use transceivers at home, but you have to have some simple gear for your station, which again you can build at home. (ref Rev. George Dobbs. series in Amateur Radio and Practical wireless.)

No dispute that it might not be worth the effort, though.

Thanks,

Peter

[clipclop]

Peter,
You could use it legally under your comunication laws but your modeling asociation may not allow it at club feilds and your modeling insurance would might be voide as well . The use of modified and unapproved equipement opens a BIG can of worms reguarding insureance .
Stewart

[peterbennett26]

Stewart,

What about the DIY infra-red and the AM gear that is dicsuused in the various threads, is this all solitary use and miles away from property/ etc?

Thanks,

Pete

[clipclop]

Peter,
The infa red isnt likely to cause interferance to other uses of the channels outside the area of use as is RF signals, DIY TX's may be OK in some counties if below certain output levels like the R/C toys that are mostly on 27mhz .
To convert a receiver is not the problem its the TX because of its output level .
Stewart