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From: Bendzh on 24 Feb 2007 17:19
My enlarger head makes a buzzing sound whenever the light's on and the
enlargement intensity fluctuates slightly. It's still useable, but
every so often a print is a little lighter or darker than expected.
I've ascertained the problem isn't in the timer unit, and the bulb is
new, so what could it be? Has anybody else had this problem? Thanks...

From: Nicholas O. Lindan on 24 Feb 2007 17:28
"Bendzh" <d.a.milligan(a)sms.ed.ac.uk> wrote

> [Leitz V35] head makes a buzzing sound whenever the light's on and the
> enlargement intensity fluctuates slightly.

If you are sure the buzzing is in the head the most likely cause
is a loose connection. Usually:

hissing buzz = loose connection, arcing
rattling buzz = loose transformer core, relay or hardware
humming buzz = loose transformer coil

Is the buzz constant? Happen all the time? What happens
if you give the enlarger a slap [like an old TV set]?

--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.nolindan.com/da/index.htm
n o lindan at ix dot netcom dot com


From: Richard Knoppow on 24 Feb 2007 19:02

"Nicholas O. Lindan" <see(a)sig.com> wrote in message
news:b_2Eh.6140$tD2.4279(a)newsread1.news.pas.earthlink.net...
> "Bendzh" <d.a.milligan(a)sms.ed.ac.uk> wrote
>
>> [Leitz V35] head makes a buzzing sound whenever the
>> light's on and the
>> enlargement intensity fluctuates slightly.
>
> If you are sure the buzzing is in the head the most likely
> cause
> is a loose connection. Usually:
>
> hissing buzz = loose connection, arcing
> rattling buzz = loose transformer core, relay or hardware
> humming buzz = loose transformer coil
>
> Is the buzz constant? Happen all the time? What happens
> if you give the enlarger a slap [like an old TV set]?
>
> --
> Nicholas O. Lindan, Cleveland, Ohio
> Darkroom Automation: F-Stop Timers, Enlarging Meters
> http://www.nolindan.com/da/index.htm
> n o lindan at ix dot netcom dot com
Also check the lamp socket.


--
---
Richard Knoppow
Los Angeles, CA, USA
dickburk(a)ix.netcom.com



--
Posted via a free Usenet account from http://www.teranews.com

From: Tony Polson on 24 Feb 2007 19:57
On Sat, 24 Feb 2007 16:02:07 -0800, "Richard Knoppow"
<dickburk(a)ix.netcom.com> wrote:
>
>Also check the lamp socket.


Indeed.

The screw-in clamp can loosen and has caused buzzing on both my V35s.

From: Bendzh on 25 Feb 2007 14:46
Slapping the head does nothing, and I have the lamp holder screwed in
tight. The buzzing's continuous but gets softer and louder as the bulb
is brighter and weaker.

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