On Sun, 27 Jul 2003 01:25:11 GMT, (John Crighton)
wrote:

Hello Paul,
it is time to dump that receiver and start again. It is too
small and tiddly and I know you do not like surface
mount size components. I would imagine that you
have plenty of room inside that robot of yours to
take a fairly large die cast box. My suggestion is
find a radio control receiver that you can get
circuit diagrams for or build one from scratch
on large pieces of printed circuit board using
"ugly construction" or "dead bug construction".
Google those terms and you will see what I am
talking about.

Thanks for the suggestion, John. It *does* make a lot of sense, I must
admit. Hadn't considered that possibility, to be honest. I've never
been a fan of dead bug construction - there's no satisfaction in
seeing the finished job - so may well have a stab at using regular,
proper-sized discretes along the same lines. And yes, there's no
shortage of space, either. Way to go over the long term, I reckon.
Thanks again.
--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

Paul Burridge wrote:
Thanks, Don. I'm aware this is a daft way of doing it, but I don't
have much choice. The IF stages of this rx are not accessable and no
schematic is available, either. The makers have declined to make them
available and threatened any service personel who do so with
termination of their contracts.

Please tell us the name of this incredibly awful company so that we may
avoid buying their products.

--
All relevant people are pertinent.
All rude people are impertinent.
Therefore, no rude people are relevant.
-- Solomon W. Golomb

Paul Burridge wrote:
Thanks, Don. I'm aware this is a daft way of doing it, but I don't
have much choice. The IF stages of this rx are not accessable and no
schematic is available, either. The makers have declined to make them
available and threatened any service personel who do so with
termination of their contracts.

Please tell us the name of this incredibly awful company so that we may
avoid buying their products.

--
All relevant people are pertinent.
All rude people are impertinent.
Therefore, no rude people are relevant.
-- Solomon W. Golomb

On Sun, 27 Jul 2003 17:14:59 GMT, "Clifton T. Sharp Jr."
wrote:

Paul Burridge wrote:
Thanks, Don. I'm aware this is a daft way of doing it, but I don't
have much choice. The IF stages of this rx are not accessable and no
schematic is available, either. The makers have declined to make them
available and threatened any service personel who do so with
termination of their contracts.

Please tell us the name of this incredibly awful company so that we may
avoid buying their products.

Sanwa. They mostly make radio-control stuff.

--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

On Sun, 27 Jul 2003 17:14:59 GMT, "Clifton T. Sharp Jr."
wrote:

Paul Burridge wrote:
Thanks, Don. I'm aware this is a daft way of doing it, but I don't
have much choice. The IF stages of this rx are not accessable and no
schematic is available, either. The makers have declined to make them
available and threatened any service personel who do so with
termination of their contracts.

Please tell us the name of this incredibly awful company so that we may
avoid buying their products.

Sanwa. They mostly make radio-control stuff.

--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

On Sun, 27 Jul 2003 13:46:57 +0100, Paul Burridge
wrote:


Thanks for the suggestion, John. It *does* make a lot of sense, I must
admit. Hadn't considered that possibility, to be honest. I've never
been a fan of dead bug construction - there's no satisfaction in
seeing the finished job - so may well have a stab at using regular,
proper-sized discretes along the same lines. And yes, there's no
shortage of space, either. Way to go over the long term, I reckon.
Thanks again.
--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

Hello Paul,
since you are not keen on dead bug construction here
is a couple of websites that talk about Micron radio
control kits.

http://www.micronradiocontrol.fsnet.co.uk/

http://www.norcim.fsnet.co.uk/

I am sure there are other kits around, maybe someone
else will mention some.

Radio Control Models & Electronics magazine is still
around. Years ago there were lots of construction
projects. I don't know if the magazine still caters for
the do it yourself enthusiast. Decades ago it did.
http://www.hhc.co.uk/pages/show/entr...record_flag/59
You could enquire from them about build it
yourself radio 40 MHz radio control systems.

Here is another site with an article on interference and
servo connections and lots of other good stuff. Shows
your airtronics/(sanwa) servo connections.
http://www.uoguelph.ca/~antoon/hobby/hints.htm
No need to change servos with a different receiver.

Back to your interference problem. Is your operating
channel frequency smack in the middle of the 40 Mhz band?
If so, maybe you could try a different set of crystals, so
that you operate as far away from everyone else as
possible. Or simply just borrow a different set of crystals
in case there is a weird mix going on, just to eliminate
that possibility.

How did you go with Win's soft start motor controller?

Regards,
John Crighton
Sydney

On Sun, 27 Jul 2003 13:46:57 +0100, Paul Burridge
wrote:


Thanks for the suggestion, John. It *does* make a lot of sense, I must
admit. Hadn't considered that possibility, to be honest. I've never
been a fan of dead bug construction - there's no satisfaction in
seeing the finished job - so may well have a stab at using regular,
proper-sized discretes along the same lines. And yes, there's no
shortage of space, either. Way to go over the long term, I reckon.
Thanks again.
--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

Hello Paul,
since you are not keen on dead bug construction here
is a couple of websites that talk about Micron radio
control kits.

http://www.micronradiocontrol.fsnet.co.uk/

http://www.norcim.fsnet.co.uk/

I am sure there are other kits around, maybe someone
else will mention some.

Radio Control Models & Electronics magazine is still
around. Years ago there were lots of construction
projects. I don't know if the magazine still caters for
the do it yourself enthusiast. Decades ago it did.
http://www.hhc.co.uk/pages/show/entr...record_flag/59
You could enquire from them about build it
yourself radio 40 MHz radio control systems.

Here is another site with an article on interference and
servo connections and lots of other good stuff. Shows
your airtronics/(sanwa) servo connections.
http://www.uoguelph.ca/~antoon/hobby/hints.htm
No need to change servos with a different receiver.

Back to your interference problem. Is your operating
channel frequency smack in the middle of the 40 Mhz band?
If so, maybe you could try a different set of crystals, so
that you operate as far away from everyone else as
possible. Or simply just borrow a different set of crystals
in case there is a weird mix going on, just to eliminate
that possibility.

How did you go with Win's soft start motor controller?

Regards,
John Crighton
Sydney

On Sun, 27 Jul 2003 21:21:52 GMT, (John Crighton)
wrote:


Hello Paul,
since you are not keen on dead bug construction here
is a couple of websites that talk about Micron radio
control kits.

http://www.micronradiocontrol.fsnet.co.uk/

http://www.norcim.fsnet.co.uk/

I am sure there are other kits around, maybe someone
else will mention some.

Radio Control Models & Electronics magazine is still
around. Years ago there were lots of construction
projects. I don't know if the magazine still caters for
the do it yourself enthusiast. Decades ago it did.
http://www.hhc.co.uk/pages/show/entr...record_flag/59
You could enquire from them about build it
yourself radio 40 MHz radio control systems.

Here is another site with an article on interference and
servo connections and lots of other good stuff. Shows
your airtronics/(sanwa) servo connections.
http://www.uoguelph.ca/~antoon/hobby/hints.htm
No need to change servos with a different receiver.

Thanks for the pointers, John. They are duly noted!

Back to your interference problem. Is your operating
channel frequency smack in the middle of the 40 Mhz band?
If so, maybe you could try a different set of crystals, so
that you operate as far away from everyone else as
possible. Or simply just borrow a different set of crystals
in case there is a weird mix going on, just to eliminate
that possibility.

We've recently got wise to that one and I've ordered a pair of xtals
from the *last* channel of the band. That's what we'll be running with
come the last week in August, when we're due up for the next filming.

How did you go with Win's soft start motor controller?

Currently under construction...
--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

On Sun, 27 Jul 2003 21:21:52 GMT, (John Crighton)
wrote:


Hello Paul,
since you are not keen on dead bug construction here
is a couple of websites that talk about Micron radio
control kits.

http://www.micronradiocontrol.fsnet.co.uk/

http://www.norcim.fsnet.co.uk/

I am sure there are other kits around, maybe someone
else will mention some.

Radio Control Models & Electronics magazine is still
around. Years ago there were lots of construction
projects. I don't know if the magazine still caters for
the do it yourself enthusiast. Decades ago it did.
http://www.hhc.co.uk/pages/show/entr...record_flag/59
You could enquire from them about build it
yourself radio 40 MHz radio control systems.

Here is another site with an article on interference and
servo connections and lots of other good stuff. Shows
your airtronics/(sanwa) servo connections.
http://www.uoguelph.ca/~antoon/hobby/hints.htm
No need to change servos with a different receiver.

Thanks for the pointers, John. They are duly noted!

Back to your interference problem. Is your operating
channel frequency smack in the middle of the 40 Mhz band?
If so, maybe you could try a different set of crystals, so
that you operate as far away from everyone else as
possible. Or simply just borrow a different set of crystals
in case there is a weird mix going on, just to eliminate
that possibility.

We've recently got wise to that one and I've ordered a pair of xtals
from the *last* channel of the band. That's what we'll be running with
come the last week in August, when we're due up for the next filming.

How did you go with Win's soft start motor controller?

Currently under construction...
--

"I believe history will be kind to me, since I intend
to write it." - Winston Churchill

On Sun, 27 Jul 2003 22:33:48 +0100, Paul Burridge
wrote:


How did you go with Win's soft start motor controller?

Currently under construction...
--

Hello Paul,
you are dragging the anchor a bit. That was months ago! :-)

Have a look here
http://www.ife.tugraz.at/datashts/nsc/h7912.pdf
Page 9. Application hints, has some good reading
on how to play around with the input transformer.

Is Henry's Radio still around? They used sell
sets of IF coils for hobbyists and experimenters. My
Henry's catalogue is a bit old. A nice Indian gent in
an electronics junk shop in Edgeware Road gave it
to me in 1973. I should come over there and get
a more up to date copy. Are the electronic disposal
shops still there?
Maybe rob some 455 KHz IF coils out of a dud
transistor radio if necessary. Save some dosh.

Get that Dalo etch resist pen out, bottle of ferric chloride
and sharpen your old soldering iron.

You have a good Tek CRO and a Signal Generator.

Do I sound like I am pushing you? Heh heh heh....

Regards,
John Crighton
Sydney