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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 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 |
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