Regarding leaving the heater cord plugged in, I wouldn't, except when I was printing. I recall that they wanted you to plug it in an hour or so ahead of time. But I don't recall any rationale for leaving it plugged in all the time. Most of all, have fun. Bob -----Original Message----- From: pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of John Meyers Sent: Friday, September 02, 2005 8:43 PM To: pure-silver@xxxxxxxxxxxxx Subject: [pure-silver] Re: Beseler/cold light enlarger questions Ahhh, that's it. So I did have things connected incorrectly. Thank you so much. I bypassed the resistrol as you suggested, and everything works properly now. No flickering light, and both timers working properly. Should I leave the heater cord plugged in all the time; i.e. when not printing? (On a previous visit to the Aristogrid website, I didn't find the setup instructions. But upon a second look, I did come across set-up instructions which describe the heater/light power cord setup. It's a little hidden there) Thanks. John Meyers --- Bob Younger <younger@xxxxxxxxxxxxxxxxxxxxxxxx> wrote: > With the cold light head you should bypass the > Resitrol > completely. The heater cord should be plugged into a > non-switched outlet; and you should allow the lamps > to warm > up. That should help your flickering problem. I > never had > any problem with mine using a regular timer. > > With the condenser lamp the Resistrol was designed > to enable > you to consistently set a voltage for repeatability. > So, you > can set it a voltage you know you can always rely on > having, > say, 105 or 110 volts. > > Bob Younger > younger@xxxxxxxxxxxxxxxxxxxxxxxx > > -----Original Message----- > From: pure-silver-bounce@xxxxxxxxxxxxx > [mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf > Of john > stockdale > Sent: Saturday, September 03, 2005 8:39 AM > To: pure-silver@xxxxxxxxxxxxx > Subject: [pure-silver] Re: Beseler/cold light > enlarger > questions > > Leaving aside for a moment your timers and the > Resistrol > (about which I > know nothing but guess is a dimmer), > > the condenser head simply has an incandescent globe > (with a > filament) so it > just gets plugged into power. Any photographic timer > should > be ok. > > the cold light head has two inputs: one is a heating > element > that goes part > of the way to stabilizing the output from the head > by > keeping the unit warm > between exposures. (The light output varies with > temperature). The other > cable is the lamp. Which is which? Plug one cable > into the > power. If the > lamp turns on, that's the lamp cable. If it doesn't, > it's > the heater cable. > > The condenser head should be fine with any timer. > The cold > light heads, as > I understand it, impose a difficult load on some > devices, > and you might > need a relay (contacter in USA?) to isolate the load > from > the timer. If > the cold light head appears to work well plugged > into the > power directly, > but flickers on the timer, then it's definitely not > a good > combination > without the relay/contacter. The heater element is > connected to the power > for the whole session. Some people connect it so > that it's > off during > exposures (using the safelight output of the timer) > so that > heat buildup is > lessened during exposure, but I don't know if it > makes much > difference. > > Can't help you with the Resistrol. Maybe you don't > need it. > > The aristo web site might have some info. > http://www.aristogrid.com/ > > Hope this helps > ================================== > At 12:39 PM 2/09/2005, you wrote: > >Hi, > > > >I just bought a Beseler MCRX enlarger w/ both an > >Aristo V54 cold light head and a condenser head. > I've > >never used either a cold light or a Beseler > enlarger > >before, and no manuals were included. I'm wondering > if > >I've set up everything correctly. I'm hoping > someone > >on the list uses a Beseler 4x5 enlarger or cold > light > >head who might be able to help me out? > > > >My questions: > > > >1. I set it up w/ the Gralab 450 digital timer that > >came w/ it, and it seems to work alright, but the > >light from the cold light head flickers a bit, > rather > >than being a stong constant light. Is that standard > >for cold light head? > > > >2. When I use my Beseler Audible Repeating timer w/ > >the cold light, times up through 8 seconds seem > >accurate compared to my watch, but longer times are > >slightly short by half a second or slightly more. > In > >addition, the metronome beeps on this timer are now > >slower than 1 second. For example, if I set 14 > >seconds, the light will be on for 13.5 seconds or > so, > >but I only get 10 beeps. At 5 seconds, I get 4 > beeps. > >This problem w/ the metronome does not happen w/ > the > >Gralab timer, and it does not happen w/ either > timer > >when using the condenser head. Can one only use > >certain timers w/ a cold light head? > > > >I really like the Beseler timer, and would prefer > to > >use that one, but am afraid I might burn it out. > > > >3. Am I setting up everything correctly? > > > >The cold light head has 2 power cords coming out of > >the light. One goes to the timer, the other goes > into > >the plug on the side of the Resistrol. The timer is > >plugged into the outlet labelled "switch" on the > front > >of the motor, and the power cord from the motor > goes > >to the wall outlet. > > > >The condenser head has only one power cord, so must > be > >set up differently. The way I figured out for that > is > >to plug the lamphouse into the Resistrol, plug the > >motor power cord into the timer, and the timer into > >the wall. Into the "switch" outlet on the motor, I > >plug in a very short cord that ends with a toggle > >on/off switch. (with this set-up I can only use the > >motor when the timer is set to focus. > > > >4. What's the purpose of the Resistrol adjustment, > and > >when should I change it? (With the condenser head, > >the needle registers a little over 90 volts. With > the > >cold light, it only moves slightly up to around 50. > > > >Thanks. > > > >John Meyers > > > > > > > > > > > >__________________________________ > >Yahoo! Mail for Mobile > >Take Yahoo! Mail with you! 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