SF classic mod

[AilSnail]

Question on SF classic mod

Ref here: http://dmcleish.com/CPF/Mc-Classic/index.html

Why is the reflector threaded? can the regular McR be used?

Is it modified in any other way than the threads?

What keeps the lens from coming into the head?

How is the lens seal in those classics?

What threads is the McCapsule?

 

[McGizmo]

Hello AilSnail /ubbthreads/images/graemlins/smile.gif,

Where have you been hiding??

The reflector is threaded to allow it to go past the threads and in some cases, "float" beyond the threads and in other cases remain captive since the threads go all the way forward. If the reflector were turned down with no threads, in some of the heads that don't have threads all the way forward, the reflector would end up sloppy and not centered when it was installed. I don'thave time to get into it completely but in reworking the 27 mm reflector to fit into the classic heads, keeping the OD as large as possible was preferable and threads needed. A standard MCR-27 or PR reflector will not fit. The reflector is modifice considerably and the threads are just one aspect. kj has a web page showing the "before" and after on the reflector.

The window is held captive in the classic heads in diferent manners depending on the head. In some cases, the window is lexan and pressed in from the front. In other cases, it is pyrex and held captive betwen an internal shoulder and a threaded bezel ring from the front.

I don't recall the threads of the McCapsule off hand other than I believe the pitch is 32 TPI. The McCapsule was designed as a replacement component for the LongBow capsules. I made the mistake of discovering that it could be dropped into the classic battery tubes and further mistake of completing the mod with a modified and threaded reflector that I shared here on CPF. I am learning and I have since done some mods that I have not shared. /ubbthreads/images/graemlins/frown.gif

The McCapsule along with a modified reflector *can* be tweaked to work in some of the Classic heads. There is a thread or two in the mod forum about this. It is not a simple "drop in" sollutinand the thermal paths in some cases should limit the power levels considered.

The problem for me is that I need to limit my CPF time on certain discussions and ideas if I am to be at all reponsive in other areas and providing builds with components that do exist and work reasonably well.

 

[AilSnail]

Hi, thanks, I am much more enlightened now on that mod and the classics too. Half a year ago I had considered the C2 as a replacement for the lost PR-E2E because I felt the seals might be more secure than in the E system (is there still room in the group of anal obsessives?).

McGizmo, you are such a PUSHOVER! /ubbthreads/images/graemlins/smile.gif Good for us with limited machining abilities though (battery drill, file and stanley knife). Keep showing off your experiments.

Apparently I suddenly dissapeared from CPF when I started working shifts. Later on I restarted an older project:

but now I am helplessly sucked into the flashlight mania again.

 

[McGizmo]

Cool boat!!! Is that a 505? (been away from dinghys for a while) /ubbthreads/images/graemlins/blush.gif

Check out the new Aleph heads. I believe you will find that the window seal is far superior to the PR series.

 

[AilSnail]

It is a Europe dinghy with a peter lynn ARC (!) kite.

I have done some looking into the alephs, and in fact posted a fairly extensive set of questions regarding dimensions etc in your Aleph nutshell thread /ubbthreads/images/graemlins/smile.gif

I hope to make a cross between an Arc LS and an aleph2, shorter than aleph and larger light opening than LS.

One thing I am pretty sure of is that the E-screw will fit as a sink inside the LS.