I understand the reason for your comments about using a fan speed control instead of a light dimmer but in actual testing of both types of controls we found the dimmer to provide higher resolution. In over six years of use not one of the 12 unite that our club built using the dimmers have failed. Therefore, although on a technical basis your suggestion is valid in a real work use situation the dimmers have actually worked better. Ed ----- Original Message ----- From: "Martin Cleary" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, April 07, 2002 9:57 AM Subject: Re: [RCSE] Power supply for foam -What do I need?
> The Radio Shack unit called for on the Charles River site works quite well > and is very inexpensive. Be sure to use a fan speed control and not a light > dimmer. > ----- Original Message ----- > From: "C. Barker" <[EMAIL PROTECTED]> > To: "Ed Berris" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> > Sent: Saturday, April 06, 2002 3:10 PM > Subject: Re: [RCSE] Power supply for foam -What do I need? > > > > I have an outdoor sign transformer rated @ .250 KVA and I could hook it > > up at either 12 or 24 volts so if my math is right I could get approx. > > 20A @12v or 10A @24v. > > Which would be better; 12 or 24 volts? Or is there any difference? > > > > Thanks, > > Chris > > > > > > Ed Berris wrote: > > > > > > Place a 30 volt, 5 amp transformer or something close, behind the > variac. > > > If you need one I have some brand new units that fit this description > that > > > our club uses when building power supplies for hot wire cutting. Cost > is > > > $20.00 plus UPS. > > > Ed > > > ----- Original Message ----- > > > From: "C. Barker" <[EMAIL PROTECTED]> > > > To: <[EMAIL PROTECTED]> > > > Sent: Saturday, April 06, 2002 8:43 AM > > > Subject: [RCSE] Power supply for foam -What do I need? > > > > > > > I have a what I would call a variable transformer that varies 110v AC > > > > from 1~110v @ 1 amp hooked up to a 24v, 2a transformer. It doesn't > seem > > > > to heat up the wire enough. What do I need to get a workable power > > > > supply? Is the main transformer (110v @ 1amp) enough? Would I neet to > > > > find another secondary transformer that can output more amps? > > > > Thanks for your input. > > > > > > > > Chris > > > > RCSE-List facilities provided by Model Airplane News. Send > "subscribe" > > > and "unsubscribe" requests to [EMAIL PROTECTED] > > > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" > and "unsubscribe" requests to [EMAIL PROTECTED] > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
