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[portside II]

happy new year to all
right something has been bothering me for a while now regarding my tx a hitec eclipse 7 .
when i bought it it was to controll my aircraft and was fitted with a 35mhz module which i understand has a range of about 1-2 miles.
since retiring from flight (damn trees kept jumping out in front of me plane when landing)i kept the radio gear and fitted a 40mhz module for the boats .
does this mean that the tx will transmit the same range? and what is this compaired to standard 40mhz gear?,

[Youngat65]

Yep, but how many people can still see their model 1/2 mile away let alone 2 miles
    Cheers
          Bob B

[ukengineman]

I too have a Hitec Eclipse with 35MHz and 40Mhz modules. The power output is more or less the same with either module. The large range associated with aircraft is because there is a clear unobstructed line of sight to the model and the aircraft installation normally permits the full length of the aerial to be used. Range is rarely a problem with boats as they normally operate much closer to you than aircraft. This reduced range requirement means that the normally shorter external part of the Rx aerial with boat installations is usually OK.
Alan

[portside II]

thanks Alan , Bob B that was what i was thinking but the reason for the question is would a tx with the conversion possibly cause interference to other radios nearby ie at the side because of the higher power with the ant fully extended .
if so with the ant half extended would this reduce the power transmitted

[portside II]

just had athought after reading roycv's post on stubby ants ,is there one to fit the hitec and would this help if the prob was with the power from the tx??

[ukengineman]

I wouldn't do anything, the power output from your Hitec Eclipse Tx with 40MHz module will be much the same as any 40MHz Tx. Modern 40MHz FM receivers should not suffer any overload problems when close to your Tx or any other Tx. I would not recommend operating with a short aerial or using your aerial partly extended as this can course a mismatch to the output stage in your 40MHz RF module which can lead to problems such as temperature rise and increased current consumption.
Alan

[barriew]

The maximum power output for all model control Txs is the same regardless of frequency band, and is set by the appropriate government department. As they keep changing their names I cant remember which it is, but the UKRCC web site will give details.
In other words your Tx has no more power on 40Mhz than other models.

Barrie

[Tug-Kenny RIP]

I use my Futaba Skysport 6 in the workshop with the aerial left in.

Can I ask if this is not wise please. Also, is there a difference in the battery consumption, when used this way.

Cheers...Ken

[HS93 (RIP)]

I have seen several of the older Hitec tx with no output or very low due to people leaving the ant down all the time , due as  to problems  "ukengineman " has stated I don't know about the newer ones or Futaba but the same should happen.. Peter

[portside II]

thank's lads that put's my mind at rest as there was a hidden reason behind the question ,there seems to be an area on the pond at goole where some of the other members experience interfirence and i wasn't sure weather it was my tx that had owt to do with it been an ex 35mhz unit .
but it looks like it may be the giant accumilator on the corner of the pond ,a giant cast steel cylinder with a steel piston in it which supplied the massive hydraulic power to the coal hoist on the site ,with it been steel this could be the problem even though i have not experienced any myself
what do you think ??

[Peterm]

I have been retired for many years, but when I was working on radios, this sort of metal structure could reflect some of the radio waves and this could have the effect of cancelling out some of the transmitted power from the transmitter.  I expect someone will give you  a much more technical explanation.   Pete M

[portside II]

thanks Pete  i will wait for more info from the forum