Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

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

AWA battery eliminator issue
#15

Hi Rob,

I am glad to help. Some people do crosswords, some play Sudoku. I like to solve real problems. Besides, If I am here, I'm not blowing money I don't have on ePay, buying radios that I have no room for!

This thing may best the ARBEIII. I am happy with mine, but I like the B Supply on this. For one thing, there is a 180V output. You can get 0.7W out of a 71A in the output stage of an A-K 30. Only problem is that you need -40V for C- to do that. The C- section of your supply likely tops out at -22V like the ARBEIII. The ARBEIII may have more guts on the A side. The C side looks about the same, but there is not much current drawn by a C Circuit.

I Have an A-K 30 and a 33 that I have to fix. I have also repaired the AK10, 20, 20C and 35 in my collection. These sets are not hard to figure out. The worst part of a 30 is the same as the worst part of a 35- the crumbling pot metal pulleys and brass bands that couple the 3 separate tuning caps to the single dial. However, you can reach inside and tune it manually. Other issues are the transformers. They tend to open. The P-T156 sold by AES for about $16 apiece. Similar transformers are available from the ARBEIII Guy. These are supposed to be better. The only other 2 things that are a big issue are the grid leak and 2 wirewound resistors between the tuning cap and coil and the grid if the 1st and 2nd RF Amp. These can be bypassed. The purpose of them is to suppress the possibility of the RF amps oscillating. RCA used these in the Radiola 16 and 17 also. The alternative was the Neutrodyne circuit, but they would have to pay royalties to the Hazeltine corporation (right in my hometown, about 2 miles from me when they were still Hazeltine).

"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis

Best Regards, 

MrFixr55


Messages In This Thread
AWA battery eliminator issue - by Rob Quay - 01-21-2023, 09:43 PM
RE: AWA battery eliminator issue - by MrFixr55 - 01-22-2023, 01:28 AM
RE: AWA battery eliminator issue - by Rob Quay - 01-22-2023, 10:39 PM
RE: AWA battery eliminator issue - by MrFixr55 - 01-24-2023, 09:16 PM
RE: AWA battery eliminator issue - by Rob Quay - 01-25-2023, 04:28 PM
RE: AWA battery eliminator issue - by MrFixr55 - 01-25-2023, 08:46 PM
RE: AWA battery eliminator issue - by MrFixr55 - 01-25-2023, 09:46 PM
RE: AWA battery eliminator issue - by Rob Quay - 01-25-2023, 10:49 PM
RE: AWA battery eliminator issue - by MrFixr55 - 01-26-2023, 08:27 AM
RE: AWA battery eliminator issue - by Rob Quay - 01-26-2023, 09:52 AM
RE: AWA battery eliminator issue - by Rob Quay - 01-26-2023, 12:56 PM
RE: AWA battery eliminator issue - by MrFixr55 - 01-26-2023, 05:43 PM
RE: AWA battery eliminator issue - by radiorich - 01-27-2023, 02:02 AM
RE: AWA battery eliminator issue - by Rob Quay - 01-27-2023, 03:33 PM
RE: AWA battery eliminator issue - by MrFixr55 - 01-27-2023, 10:12 PM
RE: AWA battery eliminator issue - by radiorich - 01-27-2023, 10:22 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM
Philco 610B oscillator wiring
Regarding the oscillator circuit which is comprised of the 6A7's cathode, control grid, and screen grid. These elements ...Radioroslyn — 10:33 AM
Philco 42-345 Restoration/Repair
Hi OSanders, First off, welcome to the Philco Phorum where Phine Phamily-Phriendly Pholks Phull of Philco Phacts and P...MrFixr55 — 08:41 AM
Philco 42-345 Restoration/Repair
Today I've been reading through the site trying to learn more about this radio. I also soldered the lose power cord cabl...osanders0311 — 08:24 PM
Philco 610B oscillator wiring
Thanks David! I do have that same later prodution model 610 schematic. I've also studied the Philco service bulletins fo...Tubester — 08:12 PM
Philco 610B oscillator wiring
Some info from Beitmans says late production. David   David — 06:06 PM

[-]
Who's Online
There are currently 2481 online users. [Complete List]
» 2 Member(s) | 2479 Guest(s)
AvatarAvatar

>