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Old 1st January 2013, 04:42 PM   #31
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Smile ( part 10 ) THE FINISHED RESISTOR !!

The resistor is finished !!

Our photographer Bud 'Rollei' got a DVD, of Stanley Kubrick's 2001, for Christmas...
...need I say more !!!

Cheers.


Si.
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File Type: jpg Square 3.9R 768sq.jpg (35.2 KB, 51 views)
File Type: jpg Stanley Kubric 3.9R 1024x482.jpg (30.6 KB, 50 views)
File Type: jpg The Space Egg Corp 3.9R Close-Up.jpg (106.9 KB, 49 views)
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Old 2nd January 2013, 12:47 PM   #32
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Very nice. How was the text/marking created?
Or; Out of orange and white paint?
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Old 6th January 2013, 10:26 PM   #33
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Hi FdW

Thanks very much !...

The '3.9' marking was made with simple 'old-school', rub-down dry-lettering ( Letraset etc. ).
Not needed really...
...just thought we'd go for a nice-appearance for the 'pack-shot' !...

OK...
...just a quick 'resistor-round-up'; for anyone who wants to try their own.
The insulation, winding, encapsulation & lead-out fixing, are all great !...
...we would use those methods again, no probs.

One slight improvement for future resistors though.
All the wire-types we had were 'Nickel-Chromium', and as such, are 'un-solderable'.
The connections to the lead-outs, were tied, wrapped about a dozen times; then crimped ( cold-welded ? ) under extreme pressure.
Although the resistor measures correctly & appears pretty stable...
...we would much prefer the connection to be soldered, for absolute guarateed long term stability...
...so...
...off to e-Bay to get some more wire !.

The type to look for is 'Copper-Nickel' or CuNi44, also called 'Isotan', 'Constantan' and sometimes 'Eureka-Wire' ( anyone know why ? ).
Anyhow, we are going for some solderable 'Eureka' for the following resistor builds...
...solderable seems a best option here.

I have seen this wire in 100 Ohm per metre & 50 Ohm per metre versions...
...others as well, I think.
The resistors we want to make are all pretty low-value jobs...
...NO we're NOT thinking to do any 1 Meg Ohm ones !!!
Could be a total wind-up !...
...might take a WEEK to construct.
Mmmm...
...Have got 'The Godfather' Part I, II & III to watch though ( 9 hours ! phew ).

Cheers.


Si.
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File Type: jpg Isotan CuNi44 Konstantan 100 Ohm per Metre Resistance Wire.JPG (71.8 KB, 39 views)
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Old 11th January 2013, 03:40 AM   #34
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Wink !

!
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Old 11th January 2013, 03:43 AM   #35
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BOO YAH !
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Old 15th February 2013, 12:39 AM   #36
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Red face Reverse RIAA...To The Maximum...!!!

Hi Phono Fans.
---------------

RC - EQ, thank you !...

Salas - Questions coming...

FdW - How many oC for the tropical fish ?

Merlin - nuts ? ( got em' ? )

Boo Jah...

Cheers.


Si.
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File Type: jpg Reverse RIAA Board Layout.jpg (505.3 KB, 8 views)
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Old 15th February 2013, 09:55 AM   #37
FdW is offline FdW  Netherlands
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Are these glass (the resistors)
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Old 15th February 2013, 03:24 PM   #38
FdW is offline FdW  Netherlands
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What about this, I took a picture of my 'old-skool'-capacitor-stock, and I may be persuaded to donate a few. The question is; what do you need and what do I get you see my previous price still has not arrived see Squirrel And G-Man Twenty Four Hour Party People Carnt Smile (White Out).............
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Last edited by FdW; 15th February 2013 at 03:28 PM.
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Old 19th February 2013, 12:03 AM   #39
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Thumbs up All Wire-Wound... Precision... Reverse RIAA Filter.

Hi FdW

Thanks for the PM...
oC tropical-fish...
...just my bad joke !
( they don't like wide temp. range ! )...

The resistors are all wire-wound.
Mostly ceramic/glass, and some glass-fibre cored.
( we've had a load apart, for scientific-study...VANDAL ! )

Spent the autumn on eBay adding to TSEC wire-wound stash...
We now have enough for a ULTRA low-noise Reverse RIAA filter...
...the 2 new phono preamps & 4 shunt regulators...
...my valve amp Heathkit MA-12's rebuild ( going slowly, but gettin' there ! )...
...another amp project, with Toshiba MOSFET's ( gettin' there, as well ! )...
...a n d...
...a microphone !!!

The board layout is for the reverse RIAA...
...when the workshop gets above 1 oC...
...we'll cut and drill the board.
( new Teflon experiment ! )...

We've got quite a Tropical Fish stash as well !
Nice one FdW !...
These will be swimming their way onto the new phono preamp & shunt boards...
...just drawing some layouts now; quite a few weird-size NOS parts need fitting in !
( Abbey Road EMI Teflon's !!!...let it be...baby ! )...

The wire-wound reverse RIAA is getting matched bunches of Philips Polystyrenes...
...spot on accurate...0% tolerance...ever so slight drift though...
...Mmmm...?
Should I be using silver-mica for a slight improvement here ?...
Dunno...

More news soon...
...drawn board, cut soon as well, I hope !...
( iced-fingers permiting ! )...

Cheers


Si.
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Old 10th March 2013, 04:32 AM   #40
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Thumbs up Some potential layouts for the 'Simplistic NJFET'...

Yas...yas...yas...
...another please !...

Don't you just love NOS, retro, vintage, freakin' OLD components !!!...
...BIG, weird sizes, NOT bandoliered on tape...
...imported from the USSR ( and obscure counties of England ! )...

Luvin' it !...

Here's some potential layouts for the new phono pre...

Workshop's still bŁ%!&$ cold !...
...so we draw now, & cut a bit later ( warmer ! )...
...let me see some Dafodils ( PLEASE !!! )

Cheers.


Si.
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