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[Martin (Admin)]

Via email to Mayhem...


Hi Martin,

I looking for something on your forum.  I have seen that there are quite a few guys in this hobby who buy 35mhz transmitters and convert them to 40mhz. I am looking for someone who converted their rr 35mhz tx and don't want to keep the 35mhz board.

Regards,
S.

[w3bby]

Read this LINK

With the low price of various new systems today I doubt that it would make economic sense to do this. Conversion to 2,4GHz could be an option depending on which set you have and what you are going to use it for.

Another alternative is to try this forum where they seem to make it sound easy......

[malcolmfrary]

It is true that conversion to 2.4GHz is cheap these days, but that was not the question.  The OP probably has a collection of 35MHz RXs and has a need for a matching TX.  It is quite possible that someone has done the conversion the other way, and has a spare 35MHz module doing nothing.  However cheap it might be to convert a TX to 2.4, replacing the RXs erodes the cost advantage quickly.

[Circlip]

Pity you followed your first link with the second w3bby. Same old question keeps rearing its head, the simple answer being NO. I'm not going to bring the word cheapskate into this post as it's a totally inappropriate word. If you know anything about electronics, you wouldn't be asking the question. The days of home construction of R/C gear are long gone as the Chinese have crippled the cost market so it's not a necessity of trying to save cost. When I built my Remcon Quantum six with two servos, it was marginally cheaper than an OS system of similar spec (27 moggie AM) but without the ability to easily change frequencies. The saving grace was that I could buy separate packs of components to spread out the building costs.

  When we went down the FM route thanks to the flood of CB units crashing onto the AM market, the ability again to be able to construct ones own again was a  viable proposition and the initial design of a 35Moggie system showed a modification to convert to 40 moggs for the land based frequency. This entailed changing components which was more than crystal swapping and coil twiddling although the latter had to be done after doing the former.

 Amusing that the guy in the second post signs his avatar as "Electronics Guru".

  Thanks to so many having a "Disposable" income, places like "Machine Mart" and "Clarke" etc. sell cheap "Professional" tools and Fred next door has just bought an electric or gas or whatever welder and has "Glued" a few bits of metal together. Question is, would you entrust him to do a chassis repair on your car or construct a steel boiler for your "Toy" steam engine?

  The new 2.4 giggly 5 channel units are cheaper than we paid for a 2 channel AM system so why risk compromising the Safety (Not only yours but others) aspect of trying to roll your own?


  Regards  Ian.

[w3bby]

Quite correct Colin  it was not the question.... This should go under the wanted section.......

[Subculture]

Inexpensive 2.4ghz equipment is of little benefit to the model submarine community. 40mhz equipment is still available but is becoming harder to source, especially transmitters, but there is huge glut of 35mhz equipment on the secondhand market as aero modellers chop in their old gear for shiny new 2,4 ghz.

Whilst you may not want amateurs tinkering with the electronics on these sets, there's not a lot you can do to stop it, therefore it may be appropriate to at least give a reasonable guide to show how to do it correctly, at least then there is less chance of error.

The 'electronics guru' referred to in a earlier post also posts on here as Sub John. I think if you take a look at what he's upto, you'll quickly get the idea that the chap knows his way around a schematic.

[CF-FZG]

My advice,

If you are a competent electronics engineer you should know how to do it, if you're not - don't bother trying as it's unlikely you'll have the necessary skills or abilities to do the work, and certainly not the test equipment to verify the conversion is operating within legal limits.

If you're converting a 'module' based system then as long as you can follow instructions, and in some cases wield a soldering iron - it should be within your capabilities.

Except for 'plug in' modules, any of these conversions cannot be sold or passed on to a third party, unless you're prepared to obtain a CE mark


Mark.

[portside II]

I can understand the wanting of 40mhz gear for the sub lads , but for the surface just get a 2.4ghz set up saves all that fiddling with solder etc .
I however successfully converted my 35mhz radio to 40mhz in about 10 seconds  .
It was easy hitech eclipse 7 35mhz remove the module from the back and plug in a 40mhz module done  .
Apparently this can be done with most if not all module transmitters, and i didnt even switch the iron on.
daz

[malcolmfrary]

I can understand the wanting of 40mhz gear for the sub lads , but for the surface just get a 2.4ghz set up saves all that fiddling with solder etc .
I however successfully converted my 35mhz radio to 40mhz in about 10 seconds  .
It was easy hitech eclipse 7 35mhz remove the module from the back and plug in a 40mhz module done  .
Apparently this can be done with most if not all module transmitters, and i didnt even switch the iron on.
daz

And that is what the OP was about - he would like to get his hands on a now surplus 35MHz module, presumably to ease use of his big pile of 35MHz receivers without the expense of replacing them with 2.4GHz RXs.

[CF-FZG]

And that is what the OP was about - he would like to get his hands on a now surplus 35MHz module, presumably to ease use of his big pile of 35MHz receivers without the expense of replacing them with 2.4GHz RXs.

Actually he said he wanted the 35MHz (RF) board - some RF boards are plug in, some are hard wired, (both come under my 2nd line about modules)

I have seen that there are quite a few guys in this hobby who buy 35mhz transmitters and convert them to 40mhz. I am looking for someone who converted their rr 35mhz tx and don't want to keep the 35mhz board.

So if he'd said which transmitter he wanted to convert, it would have saved a lot of hassle - but more importantly he could have been given some sensible advice


Mark.

[Circlip]

The 'electronics guru' referred to in a earlier post also posts on here as Sub John. I think if you take a look at what he's upto, you'll quickly get the idea that the chap knows his way around a schematic.

  Precisely

 

So if he'd said which transmitter he wanted to convert,

  He did, it's a rr35mhz  one 

  Regards Ian.

[CF-FZG]

  He did, it's a rr35mhz  one 

Pray tell where I might find any info on a rr35mhz transmitter??


Mark.

[Circlip]

Ahhhhh, you didn't ask That question.  Trust Martin to only supply sketchy information, and they wonder why the bonfire starts. Bad management again.

  Regards   Ian