Quote from: sushil_anand on February 05, 2010, 10:37:31 AM
VC, please ignore the above!!

Exactly. Just get your hands on whatever you can find easily (regardless of conversion type).  If you have choice (same availability and similar price, go for dual conversion). 

Even this "adjacent channel interference handling advantage" is a non issue these days, as the quality of the electronic parts involved have greatly improved that this is not considered a routine issue any more.

Quoteas the quality of the electronic parts involved have greatly improved that this is not considered a routine issue any more.

Anwar, the quality of parts is not the factor. Ask any one who does SW radio  listening - or "DXing" - and he/she will swear by the difference between single and dual conversion.

But it is, admittedly,  a non issue for RC.

 

Having some fun at my expense, are you guys?!
Wait till I grow up and become knowledgeable like you, then I'm gonna show you - "adjacent channel interference handling advantage" and "10 kHz spacing"!!!

I'm having fun! But seriously guys, thanks a ton for trying to help me out.

Cheers!

VC

Told you to ignore me

But seriously, if you are contemplating getting into the hobby on a long term basis, spend even 20% more than your budget on a good Tx/Rx combo. You will not regret it. There is some pretty decent gear available from the on-line stores without the hassle of imports. Also keep your eyes open for re-sale items. There ARE good deals sometimes, particularly hen people are upgrading or giving up !!

Quote from: sushil_anand on February 05, 2010, 11:31:45 AM
Anwar, the quality of parts is not the factor. Ask any one who does SW radio  listening - or "DXing" - and he/she will swear by the difference between single and dual conversion.

But it is, admittedly,  a non issue for RC.

It is a non-issue partly because of the channel spacing in RC, but it was a significant issue in the earlier times when the parts had wider tolerances.  From what I remember reading, crystals were the ones particularly prone to "creeping outside" their intended values, and dual conversion had greater advantage. With such parts working well within then intended/specified ranges, this seems to have become a non-issue (again, so much as JR did not even bother with it).

And yes, my response was RC specific

Sushil,

I guess there are very few people who are as taken up by modelling / aeromodelling as I am. Just that I have never thought about RC Aeromodelling very seriously, until recently. I've been scratch building gliders and stuff for the past 35 years. Most of this time has been devoted to Static modelling. I love scale, details and authenticity.

You are 100% right when you say that I should invest in a good Tx/Rx combo. So far I've been lucky (except this particular set) and people have given me wonderful bargains.

I am on the lookout for a 'proper' 6 Ch unit. Let me know if you come across something. I also need to work on my theory, like you guys, rather than just send something up in the air and pray for fair winds and trust in luck (which, I believe, doesn't exist!).

Cheers!

VC

I don't believe this! After all that we've been through collectively, look what I found........

http://www.rcuniverse.com/forum/m_4613570/mpage_2/key_/tm.htm

Keeping my fingers and toes crossed!

all the best, do post result

Will do Sir!

The moment you get documentation, the game changes    

There is a serious lesson in this though (about the challenges in usage of all-in-one receiver units that come with RTF helis for other purposes).

Hi VC,
Any progress?

Not yet. Just this evening, an experienced RC modeller spent over 4 hrs with me unsuccessfully trying to breathe life into it. Now he has packed it up and taken it home. Let's hope he can bring it back to life. I have given up hope. However, there is a major lesson that I have learnt here.

This reminds me of a quote I saw at the back of a truck - "100 mein 80 log bay-i-man, phir bhi bole mera desh mahan"

Pankaj,

I am not calling anyone a be-imaan. However, I would warn all newbies out there to beware of the Big Bad World and be aware of what your requirements are. Don't just buy something because it looks/sounds lucrative. Also remember, Helis and Planes DO crash and that there are a lot of people out there who are more than willing to unload their junk on you (in return for your money). If something looks/sounds too good to be true - it probably is! Once you have crashed and destroyed a 10 K heli/aircraft, anyone would try to recover a part of the amount through a sale of existing spares,

Make your communication with the seller 'idiot - proof'. So that there is no chance of anyone reverting and telling you later, "Oh! Is THAT what you REALLY wanted? I'm sorry, but I sold it to you in good faith because I thought you wanted something else."

Also remember, Heli Rx's and Aircraft Rx's are different in functionality. You can't always mix and match. Especially remember to avoid Chinese Rx units that come in a single package combining a Rx/Esc/Gyro. Avoid them like plague. Check with the seller and ask him to clarify. If he can't, ask him to post photographs or exact model/component numbers. Do a Google, study, research - then buy. NOT THE OTHER WAY AROUND!!!

Spell it out - tell them WHAT you really need, what you will be using it for - else you will be a suckered like I have been.

It was my fault that I, perhaps, didn't state my requirements to the seller lucidly enough.  I am now hoping against hope that the seller is reading this and offers me a refund of my money. Though I still maintain, in his place and from his point of view - he has done nothing wrong.

With no offence to anybody at all.

Cheers!

VC

QuoteI am on the lookout for a 'proper' 6 Ch unit. Let me know if you come across something.

There is a possibility of a Futaba 6 channel (6EXA if I am not mistaken) + Rx being available. The Rx is PCM and on the 36 MHz band. This is a relatively rarely used band so the chances of others being on the same frequency would be remote (pun intended)!

Will keep you posted on this as soon as it surfaces (if and when) and have had a chance to look at it.

VC

There's a posting on India RC that might be just what you need!

Check it out.

This is the one : http://www.indiarc.com/forum/index.php?topic=3231.0

Decent deal, if your budget permits.

QuoteI am on the lookout for a 'proper' 6 Ch unit. Let me know if you come across something.

VC

There is a Futaba 6 CH 2.4 GHz set available. It is in excellent condition and is with the Rx and Tx batteries (Ni Cds), switch harness, and (110 V) charger. No servos. But the asking price - 8K - seems reasonable. Will post pics once it is with me.

Reason for selling: Upgrading.

Dear Sushil / Anwar Sahab,

Thanks for the leads. However, with 31st March on the horizon, I can't think of investing 8 -10 K on a Tx/Rx right now. Especially, since I have just invested in 3 (a 2 Ch, a 4Ch and a 6 Ch Tx/Rx) sets and have not had the opportunity of testing either one of them operationally.

Thanks anyway!

VC

btw vc uncle are u interested in selling any of the sets??

Hooray! Mr. Musawir Mustafa (Aeromodelling Instructor) managed to get the set working. He had to pickle his brains for awhile and I had to scour the net for resources to guide us.The circuit diagrams helped in making some modifications. 3 out of 4 Channels are functional. Thank God!

M1 and M2 are for Motors 1 and 2 (Main and Tail).
E IS the power supply socket.
The wire D (Black, Red, Yellow) does NOT go to the ESC (Rx has inbuilt Brushed ESC), it is for the Gyro. Now it goes into the Channel 5 socket to complete the circuit (since there is no Gyro being used) - This was the crucial step!
Servos are slotted into Ch 2 and Ch 3.

Thanks everyone for trying their best to help out.

Chapter closed.