When Were These Sprague 6PS Cases Used?

[David Root]

Just got these and I'm curious as to the age of the clear plastic cases these caps are packed in. Since they're identified as Difilm (paper/mylar), I'm thinking '70s. Five .1 uF/600V 6PS for the price of one these days ($1.35) seems to fit!

I realize the age of the case is no guarantee as to age of contents, but the caps are all dipped not powder baked like they are now.

The .047 caps might be later than the .1, as they (.047) are a brighter color than the 0.1s.

I know the paper/mylar gave way to all mylar (polyester? at some stage, just not sure when.

Any 6PS historians out there?

[M Fowler]

Well when I was a young man I was clipping those OD caps out of black and white televisions sets at the city dump. So 60's/70's.

[Colossal]

Draloric resistors...now old school 6PSs...

[eyes narrowed]What are you up to Mr. Root? [/eyes narrowed]

[da Geezer]

No help on the caps, but "skepical dog" is a cutie! I laughed out loud when I saw the picture, & am still smiling.......Thx

[David Root]

A nefarious plot to do a #4 ODS, #40 or maybe a #60 without reverb, using some old 50W Fender iron and as many other period correct parts as possible.

I am also plotting to put it in this cabinet.

[andyhardy]

the dog is great!
I just bought some of those last week $1.00 a piece guy said they were easily worth 2 but he gave me a deal also got some brown ones not sure of the vintage.

Cheers

[Colossal]

Guys, I can't claim credit for Skeptical Dog. I saw that on DamnLOL.com and laughed my ass off. I keep that photo for times like these (and laugh every time I see it).

Sounds like a great project David! Can't wait to see it develop and I'm sure you'll top it off with vintage glass too. Rock on!

[ToneMerc]

I'm thinking '70s.

Pre 1978, my builds are full of them. Certainly use those in a 2nd Gen.

TM

[David Root]

Thank you TM! I really thought so.

Those caps and Mepco Electra/Electra metal films on V1, V2 plates/cathodes and Piher/Draloric carbon films elsewhere.

[ToneMerc]

Thank you TM! I really thought so.

Those caps and Mepco Electra/Electra metal films on V1, V2 plates/cathodes and Piher/Draloric carbon films elsewhere.

[David Root]

That's it! Love the variant on the OD entrance with the 680K plus 500K(?) trimpot replacing the 1M2. I have some EM-ARCO chocolate drops and a very few CDE ditto. Those CDE are very difficult to find.

Have you posted that 2nd gen amp before? If so I musta missed it.

[ampdork]

I believe all the "di-films" are paper and foil layered rather then metalized foil.

[ToneMerc]

That's it! Love the variant on the OD entrance with the 680K plus 500K(?) trimpot replacing the 1M2. I have some EM-ARCO chocolate drops and a very few CDE ditto. Those CDE are very difficult to find.

Have you posted that 2nd gen amp before? If so I musta missed it.

David the trimmer is a 1meg and i'll never build another "funky OD entrance" without that tweak. Yes, it was my last build which was my take on #004 if it was upgraded to a 4th gen transitional classic stack.

TM

[erwin_ve]

That's it! Love the variant on the OD entrance with the 680K plus 500K(?) trimpot replacing the 1M2. I have some EM-ARCO chocolate drops and a very few CDE ditto. Those CDE are very difficult to find.

Have you posted that 2nd gen amp before? If so I musta missed it.

David the trimmer is a 1meg and i'll never build another "funky OD entrance" without that tweak. Yes, it was my last build which was my take on #004 if it was upgraded to a 4th gen transitional classic stack.

TM

Smart thinking! I wonder if that tweak is present in all Dumble 4the gen amps? Easy to go under the board.

[Structo]

David can you explain what you mean by the caps being dipped or powder baked?

I haven't heard that before.