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From: legg <legg@nospam.magma.ca>
Newsgroups: sci.electronics.repair
Subject: Re: Re (3): Voltage halver.
Date: Thu, 25 Apr 2024 10:59:58 -0400
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On 24 Apr 2024 15:35:43 -0700, peter@easthope.ca wrote:

>RL and all,
>
>In article <3hot0jdfedfel1pm82vnqbn04u2bq29q37@4ax.com>, legg <legg@nospam.magma.ca> wrote: 
>> I also note that in the zeiss opmi_1 manual, a 12V 100W halogen lamp
>> is specified - and a self-resetting thermal limiter is built into 
>> the lamp holder.
>
>You have an original paper manual?
>
>OPMI 1 is a family of microscopes rather than a specific model; 
>correct?
>
>A search in eBay, for example, finds many variants. Appears that 
>components were assembled according to requirements of a customer.
>
>A search found this URL.
>http://www.frankshospitalworkshop.com/equipment/documents/microscopes/user_manuals/Zeiss%20OPMI%201%20FC%20Surgical%20Microscope%20User%20Manual.pdf
>
>The 2nd supplementary page after page 31 lists these bulbs.
>
>Endure Number                 Spare Bulbs
>
>90-1200  Zeiss  6V  30W Bt58Z       390158
>90-1201  Zeiss  6V  50W Bt86Z       390186
>90-1202  Zeiss 12V 100W HLX #64626  380075 1020
>90-1203  EFR    Housing #900
>90-1204  Zeiss 15V 150W EFR         310198
>90-1205  Zeiss 12V 100W HLX #64627  380079 9040
>90-1206  Zeiss Superlux  40
>90-1207  Zeiss Superlux 175
>90-1208  Zeiss Superlux 300 with Cartridge
>90-1209  Zeiss Superlux 300 Bulb Only - No Housing or Meter
>
>90-1302  ELS 150 21V 150W EKE
>90-1400  ELS 250 24V 250W ELC
>90-1403  ELS  24 60V  24W Metal Halide
>90-1402  ILO         300W with Cartridge
>
>EFR, ELS and ILO are bulb manufacturers?
>
>After my original enquiry, also found a page for a replacement LED 
>illuminator. 700+ $US.  Beyond my budget at present.
>
>Also found some old bulbs in boxes labeled 390153.  They have the 
>unusual (Zeiss?) triangular base and the filament is parallel to the 
>bulb axis.  The 39015 has the filament crosswise to the bulb axis.
>
>Also found an inexpensive motor controller which adjusts light 
>intensity nicely. The adjustable power brick can be set to deliver 6 
>V.  The controller connected beyond that adjusts intensity.
>
>In case a 90-1202 Zeiss 12V as listed above turns up, my power supply 
>should suffice for that also.
>
>Thanks to all for the replies,                ... P.


In the reference I found for zeiss opmi_1, illumination is 
delivered to the optics package through a long (1m ?) light 
pipe (or possibly bundles of same).

RL