[pure-silver] Re: Devere 108 trouble

I mean that the main power switch to the transtab should only be turned on at the start of your printing session and off at the end. You do not plug the power cord from that transtab unit into a timer outlet that's switched on and off by the timer. The transtab power cord should go directly to the wall outlet. This isn't how it's done on, say, an Omega enlarger. There you plug the enlarger's power cord into a timer. There are special plugs on the back of the transtab for the color head and for the timer. Another way to say this is that the fan should always run on a De Vere enlarger when you are using it, both when the head is lit and when it's not. All of this is covered in the manual. 

See: http://www.khbphotografix.com/devere/
The enlarger on the left is a standard 1980s and later De Vere vertical enlarger. Above the baseboard you see two platforms. On the platform to the left of the column, you see a De Vere timer. On the platform to the right you see the Transtab unit. Is this what you have, or do you have a "custom" setup? 

-Peter

Shannon Stoney wrote:
I don't understand any of this! When you say the main power is not meant to be repeatedly switched on and off, what do you mean? I don't see any alternative. It came with the timer on it, so I assume it must be a devere timer. You flip a switch to the far left and that turns on the fan. The next switch turns on the light for focusing. Then you turn that off and push a button to use the timer. 

--shannon


On Oct 22, 2007, at 7:07 PM, Peter De Smidt wrote:


Shannon Stoney wrote:
Usually it makes an awful screaming sound when the bulbs are bad. This time it didn't do that, but I changed them anyway just in case the screamer was broken. 

--shannon

Hi Shannon,
Contemporary De Vere color enlargers have a separate transformer/stabilizer unit i.e. a transtab. The color head plugs into the transtab, as does the timer. The transtab then plugs into the wall. The transtab has two toggle switches. One turns on power. When the power is on, so is the fan. The other would light up the head, although this is usually taken care of by the timer. Hence it's possible that the main power is on, but the head switch is off. This would cause the fan to run but the head not to light up. You do not want to plug the power cord from the transtab into a timer. * The main power is not meant to be repeatedly switched on and off! *As I said before, there a dedicated timer outlet on the transtab unit. You really should use a De Vere timer, or an RH designs timer with special plugs for the transtab. ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.
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