Testing the TK Tar Baby

[TinselKoala]

Specific Heat CC, Cape Town, South Africa.

https://www.google.com/search?q=specific+heat+cc+cape+town+south+africa&ie=utf-8&oe=utf-8&client=ubuntu&channel=fs

??

[poynt99]

PW,

Here is the schematic with the FG connection according to the first paper.

The resulting calcs. are the same as the first schematic, i.e. PBat = -36W, and both the FG and Q2 Source currents are -182mA.

[TinselKoala]

Some Google searches:

specific heat cc cape town south africa
https://www.google.com/search?q=specific+heat+cc+cape+town+south+africa&ie=utf-8&oe=utf-8&client=ubuntu&channel=fs

"Specific Heat" and "Ikram Ebrahim" :
https://www.google.com/search?q=%22Specific+Heat%22+%22Ikram+Ebrahim%22&ie=utf-8&oe=utf-8&client=ubuntu&channel=fs

"Ikram Ibrahim" "Cape Town" :
https://www.google.com/search?q=%22Ikram+Ibrahim%22+%22Cape+Town%22&ie=utf-8&oe=utf-8&client=ubuntu&channel=fs

specific heat ibrahim south africa :
https://www.google.com/search?q=specific+heat+ibrahim+south+africa&ie=utf-8&oe=utf-8&client=ubuntu&channel=fs

"Heating element" manufacturer "South Africa" :
https://www.google.com/search?q=specific%22Heating+element%22+manufacturer+%22South+Africa%22+&ie=utf-8&oe=utf-8&client=ubuntu&channel=fs

FINALLY! They seem to have an address in the neighborhood with another heat element manufacturer/ dealer but no web presence:
Specific Heat CC: 287a Lansdowne Rd, Cape Town 7780 South Africa
Telephone: (021) 674-1036 ,  (021) 6  (sic)
Fax: (021) 674-3759

Heat Terminology CC: 361 Lansdowne Road, Cape Town 7779, South Africa  021 6972266 http://heatterminology.weebly.com/

[picowatt]

PW,

Here is the schematic with the FG connection according to the first paper.

The resulting calcs. are the same as the first schematic, i.e. PBat = -36W, and both the FG and Q2 Source currents are -182mA.

.99,

Looks good.  Regarding the 36W figure, how was this arrived at?

The indicated 182ma would account for around 13 watts.

PW

[TinselKoala]

@.99, PW:

What explains the fact that there is no difference in the current or power calcs?

It would seem to me from inspecting the schematic that there should be less current in the CVR when the FG or other bias source is connected to the common ground. However, in the TB hardware, it also doesn't seem to make much if any difference in scope traces which side of the CVR it's connected to.