Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Jackson Bell 62 Ecap questions
#16

The 1 uf caps are in a lower voltage circuit, so you don't have to go up to 400 vdc rated caps, unless you already have them in stock, you could make up something by paralleling a pair of .5 uf caps, or whatever you have, to get to the 1 uf. If you have to order anything you might as well get the proper ones. Version 1 has a filter choke on the chassis somewhere, version 2 does not have the extra filter choke, both have the block condenser can with two 1 uf capacitors inside. Version 1 also has three electrolytic capacitors, version 2 does not. I've never seen this much variation in the power supply design of one model of radio before, it's almost like they were experimenting with different designs during production.
Regards
Arran
#17

Thanks Arran,
I will use the 2 .47 caps in place. I just need a darn .00025 or 250pf cap to finish it.
Anyone got one lying around? Icon_mrgreen

My caps are lovers, not fighters... Maybe they can make me a .00025 cap? Icon_lol

Kirk

Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6
#18

Kirk;
A pair of .47 uf caps will be close enough, that will equal .94 uf which is within 10%, the old paper caps had a tolerance of + or - 20%. Again this is a low voltage circuit for a tube radio so you can use just about anything above 100 vdc in place of the original 1 uf caps in that can. If they were in the B+ supply you would want to use 630 v rated ones, but these are used in the cathode circuits of the #24 detector and the #45 power output tubes. Also since they are hidden inside a can you can use radial lead capacitors, with one end of each cap together and then soldered to the can, with the other end of each soldered to it's respective terminal.
Regards
Arran
#19

thanks guys,

Too busy with the house to work but I will try. I need to figure out how to attach the ground to the cans.

Kirk

Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6




Users browsing this thread:
[-]
Recent Posts
Cannot Adjust an IF Transformer’s cores
It works! I received the PCBs this morning in the mail, and put everything together. I reused the base from the original...jrblasde — 04:32 PM
PT-6 antenna connections
I seem to have lost my way on this PT-6. I see the antenna aerial transformer schematic - I’m reading pins 1 through ...bridkarl — 12:30 PM
40-150 General questions
Good thing you're a good electrician ... the pictures show a lot of rewiring in your future! Take care and BE HEALTHY!...GarySP — 11:52 AM
40-150 General questions
I think RobB has it right. It is a part number and looks like its stamped on the chassis and that wasn't something you ...klondike98 — 11:41 AM
40-150 General questions
It's most likely a part number. Most of Philco part numbers are in that format. I looked at the parts list for this mode...RodB — 08:10 AM
40-150 General questions
Hi Kevin, No, I don't but I like your Quote about being a good electrician. The way I look at it is "The fact ...MrFixr55 — 08:06 AM
Philco 38-7 Speaker
7K should be fine. While not a perfect match (This transformer is meant for 6V6 tubes), Antique Electronic Supply (AES)...MrFixr55 — 08:03 AM
40-150 General questions
I discovered a stamp on the underside of the breadboard on my Philco 40-150. It is"56-1417' in black ink with numbe...Kevin_D — 07:14 AM
Philco 38-7 Speaker
FYI the Impedance of the HR20 (the one I have) secondary of the audio transformer is 5 ohms. The 38-7XX speaker is suppo...tludka — 04:22 PM
Philco 38-7 Speaker
Yeah, don't use the transformer currently on the H-20 (Dopf, I thought "H20, is that new technology, a speaker usin...MrFixr55 — 03:51 PM

[-]
Who's Online
There are currently 2763 online users. [Complete List]
» 2 Member(s) | 2761 Guest(s)
AvatarAvatar

>