First electrical power output from a Pyramid

[skywatcher]

At least Thomas Trawoeger is still reading this forum:

Last Active:     December 08, 2007, 10:57:08 AM

[skywatcher]

http://rapidshare.com/files/75457154/Pyramid_Zip_Files.zip

Let me know

It's working. Thanks for uploading it. 

[Walter Hofmann]

Hi all,
here are a few picture from my setup and parts. there is a probleme with the proposed lenght of the rods the 90/95mm does not fit in the frame without touching the wet area I believe the rods have to be cut down to 80/85mm. I used copper clad cougiong rods and soldered the wire on. the mainframe is soldered on the bottom and the top is a press fit with the copper T. like you can see I left the full lenght of the middle pipe standing to mark the center point, which is 180mm from the bottom. I also wana use it to find the max point in regards to the hight by mount it isolated on the pipe and then adjust the hight.
I also use 1mm mica for spacing to solder the cap .
maybe this helps.
greetigns
walt

[Pontifex]

@georgemay
Thanks for the posting concerning the pencil lead!

I remember now a PM stating that a replication used some thin pencil leads (bundled). A thick lead from one of these pencils that carpenters use at work should be ok as well (german: Zimmermannsbleistift).
The softer the lead of these pencils, the higher the content of graphite can be assumed. The amount of clay in these (soft pencil lead) mixtures is neglectable.The outcome of this is that it does not reduce the electric conductivity to a great extent (is not very important for our case anyway). The galvanic process will not be hampered too. 

The various graphite pencil grades are achieved by altering the proportion of graphite to clay: the more clay the harder the pencil. Today a set of pencils ranging from a very hard, light-marking pencil to a very soft, black-marking pencil usually ranges from hardest to softest as follows:
                                                         
(Hardest) → 9H    8H    7H    6H    5H    4H    3H    2H    H    F    HB    B    2B    3B    4B    5B    6B    7B    8B    9B (Softest)

In the United States a different system of grading and classification is used:

The following table shows approximate equivalences between the different systems:
   U.S.       World
   #1    =    B
   #2    =    HB
   #2Ã,½   =    F
   #3    =    H
   #4    =    2H

Unfortunately I will not be able to start with my replication before January ( ), although all tools and most of the required material is already in my garage. If not otherwise advised I will start with some bundled soft pencils and if it fails try to obtain some graphite rods or some of these copper coated gouging carbons.

Greetings, Pontifex

[skywatcher]

The copper coated gouging rods seem to be unavailable at least in Germany. I went to a shop which sells welding supplies to small companies (not a hobby shop) and they didn't even know what i was talking about. I also asked a professional welder and he told me that these rods are not used any more for many years. Maybe they are still available in other countries. If this is the case maybe someone from there could send a package of these rods over here to someone who can distribute them to all interested people.