[pure-silver] Re: Beseler/cold light enlarger questions
- From: John Meyers <jmeyers102@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 2 Sep 2005 20:42:41 -0700 (PDT)
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
> >
> >
> >
> >
> >
> >__________________________________
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