# Question from Canada - Silicon Chip Oct and Nov 1989

A

#### AINTME

Jan 1, 1970
0
I don't want to pay $26 because it is probably outdated technology by now. But I thought it may be a good starting point. If anybody knows of an article to build a motorcycle intercom I'd appreciate a link - Thank you. This is the response from the magazine. I am looking to build a intercom for my motorcycle to talk helmet-to- helmet with my passenger. I saw on the internet references to you Bikecom project " FM radio intercom for motorbikes" from October and November 1989 - I know it is a long shot but was wondering if the schematics where somehow available. Thank you for your time Thank you for your enquiry. Photocopies of Silicon Chip construction project articles are available from Silicon Chip Publications for$AUD13.00 each including airmail P&P
(outside Australia), ie $AUD26.00 for the complete project (in two parts). See attached order form etc. Kind regards READER SERVICES J #### John Tserkezis Jan 1, 1970 0 AINTME said: Can anybody get me this article from Silicon Chip? I don't want to pay$26 because it is probably outdated technology by now.
But I thought it may be a good starting point.
If anybody knows of an article to build a motorcycle intercom I'd
appreciate a link - Thank you.

reasonably priced.

A friend bought a whiz-bang noise cancelling wired unit, but for big bucks.
Performance was impressive enough, pity price wasn't.

My idea was to use simple headphone amps (I'm sure there are some suitable
kits around for that) and the throat mics from Jaycar.

I already have moulded ear headphones (the only way to travel on a bike IMO)
and the throat mics will lose the wind noise problem.

Involves some DIY, but compared to the work you have to put in routing
cables and such, it's not bad.
The most expensive part of this exercise would be the waterproof connectors.

I have some of the bits, but, due to the fact that I carry a pillion once
every six months or so (for short trips) it seems hardly worthwhile.

Another option that involves little or no effort (ok, no effort) is to use
the jaycar throat mics as-is (comes with one earbud earphone), with a 40
channel UHF radio in VOX mode, along with your pillion who has the same, and
bingo.
Aside from the occasional yobbo on that channel telling you to get stuffed,
it would probably be the cheapest and by far the _easiest_ way to do it.
Best of all, bike-bike communication is effectively a built-in feature.

Of course you need a rocket-scientist degree to work out the cryptic menus
to use the radios, but hey, it's cheap and easy.

J

#### John Tserkezis

Jan 1, 1970
0
Frank said:
I don't want to pay
"because it is probably outdated technology by now".

What are you talking about "outdated"? It's a bleedin' transistor amplifier
for crying out loud.

What developments have been made that make it "outdated"? Has something
better that silicon been devised? Has the design changed enough to warrant
the increase in cost and performance where you can't tell the difference
within a motorcycle helmet anyway?

What he *might* mean, is _features_. And in any case, rest assured that ANY
features he sees today in these boxes have already been invented many years ago.
And I don't even think that, because he mentioned Silicon Chip Magazine,
he's probably looking at the cheaper end of the range anyway - so the real
fancy features are irrelevant.

D

Jan 1, 1970
0
A

#### AINTME

Jan 1, 1970
0
Frank said:
They will try anything for "free"
you work it out, you start building it from scratch with trail & error
it would cost a hella lot more that $26 Why should we screw Silicon Chip they need the money to keep the magazine alive, otherwise everyone will get nothing to read Living so close to the USA I was starting to worry about the nearby high concentrations. However, now I feel relieved to find out assholes are spread all over the world. Pheeww! Thank you for your answer. PS: If your publication needs my$26 (for a 10 year old article) to
survive then I guarantee it won't. Maybe they should learn to scan and
email instead of sending shit snail-mail then it wouldn't cost so much.
Are their heads up side down too?

What are you talking about "outdated"? It's a bleedin' transistor
amplifier
for crying out loud.

I don't know I haven't seen the circuit.
What developments have been made that make it "outdated"? Has
something
better that silicon been devised?

Has the design changed enough to
warrant the increase in cost and performance where you can't tell the
difference within a motorcycle helmet anyway?
Huh?

What he *might* mean, is _features_. And in any case, rest assured
that
ANY
features he sees today in these boxes have already been invented many
years ago.
And I don't even think that, because he mentioned Silicon Chip
Magazine,
he's probably looking at the cheaper end of the range anyway - so the
real fancy features are irrelevant.

Yeah, just like you.

Now listen up children: If you don't have anything constructive to say
then shut the **** up. If you can't help then shut the **** up.

A

#### AINTME

Jan 1, 1970
0
Why build, you can buy one for \$30+postage on eBay.
TERCOM_W0QQitemZ330160257330QQihZ014QQcategoryZ32628QQssPageNameZWDVWQQ
rdZ1QQcmdZViewItem Comes with the headsets and everything.

Dave.

Yes I've seen that but the reviews say they are quite noisy.
I was hoping to have something to start with and design a bandpass filter
to get some of the noise out or leave just enough speech to be
understandable.

Thanks for the idea.

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