Marantz 4230

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Marantz 4230

Ron Ramirez
Silent Key

Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana

#16

08-24-2017, 09:55 PM

Yes, this Marantz uses four M8513A-O varistor diodes in parallel with each bias trimpot. They all tested good (out of circuit) with the diode test of my DMM.

Since the bias on the right channel was initially so high, I made initial adjustments to both right channel trimpots to get the bias down. Then, I waited the requisite 30 minutes to let the unit fully warm up, and then made the final adjustments.

--
Ron Ramirez
Ferdinand IN

Find

« Next Oldest | Next Newest »

Messages In This Thread

Marantz 4230 - by Ron Ramirez - 02-20-2017, 09:34 PM

RE: Marantz 4230 - Epilogue - by TV MAN - 02-21-2017, 09:00 AM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 02-21-2017, 11:04 AM

RE: Marantz 4230 - Epilogue - by Steve Davis - 02-21-2017, 12:43 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 02-21-2017, 05:00 PM

RE: Marantz 4230 - Epilogue - by morzh - 02-21-2017, 05:41 PM

RE: Marantz 4230 - Epilogue - by rocketeer - 03-05-2017, 12:46 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 03-05-2017, 01:34 PM

RE: Marantz 4230 - Epilogue - by rocketeer - 03-05-2017, 05:40 PM

RE: Marantz 4230 - Epilogue - by morzh - 03-05-2017, 11:07 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 08-20-2017, 03:53 PM

RE: Marantz 4230 - Epilogue - by BrendaAnnD - 08-20-2017, 05:12 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 08-20-2017, 08:20 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 08-24-2017, 08:00 PM

RE: Marantz 4230 - Epilogue - by morzh - 08-24-2017, 09:14 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 08-24-2017, 09:55 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 08-26-2017, 11:49 PM

RE: Marantz 4230 - Epilogue - by morzh - 08-27-2017, 07:42 AM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 09-04-2017, 10:12 PM

RE: Marantz 4230 - Epilogue - by morzh - 09-05-2017, 01:56 PM

RE: Marantz 4230 - Epilogue - by BrendaAnnD - 09-05-2017, 03:43 PM

RE: Marantz 4230 - Epilogue - by morzh - 09-05-2017, 03:43 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 02-14-2019, 07:33 PM

RE: Marantz 4230 - Epilogue - by morzh - 02-14-2019, 09:17 PM

RE: Marantz 4230 - Epilogue - by mikethedruid - 02-14-2019, 09:27 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 02-14-2019, 10:25 PM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 02-20-2019, 09:12 AM

RE: Marantz 4230 - Epilogue - by morzh - 02-20-2019, 09:44 AM

RE: Marantz 4230 - Epilogue - by Ron Ramirez - 02-22-2019, 10:52 PM

RE: Marantz 4230 - by Ron Ramirez - 02-23-2019, 11:04 PM

RE: Marantz 4230 - by EdHolland - 02-24-2019, 02:30 AM

RE: Marantz 4230 - by Ron Ramirez - 02-24-2019, 07:05 PM

RE: Marantz 4230 - by Ron Ramirez - 03-04-2019, 10:40 PM

RE: Marantz 4230 - by morzh - 03-04-2019, 11:34 PM

RE: Marantz 4230 - by Ron Ramirez - 03-05-2019, 11:59 AM

RE: Marantz 4230 - by morzh - 03-05-2019, 02:17 PM

RE: Marantz 4230 - by Ron Ramirez - 03-05-2019, 02:28 PM

RE: Marantz 4230 - by morzh - 03-05-2019, 04:35 PM

RE: Marantz 4230 - by Ron Ramirez - 03-05-2019, 04:43 PM

RE: Marantz 4230 - by rocketeer - 03-05-2019, 05:36 PM

RE: Marantz 4230 - by Ron Ramirez - 03-10-2019, 04:24 PM

RE: Marantz 4230 - by radiohenry - 03-10-2019, 09:08 PM

RE: Marantz 4230 - by Eliot Ness - 03-12-2019, 02:18 AM

RE: Marantz 4230 - by Ron Ramirez - 03-14-2019, 08:44 AM

RE: Marantz 4230 - by PhilcoMike - 03-15-2019, 03:08 PM

RE: Marantz 4230 - by Ron Ramirez - 03-16-2019, 07:02 PM

RE: Marantz 4230 - by rfeenstra - 03-16-2019, 07:14 PM

RE: Marantz 4230 - by Ron Ramirez - 03-16-2019, 10:08 PM

RE: Marantz 4230 - by Ron Ramirez - 04-09-2019, 07:47 PM

RE: Marantz 4230 - by EdHolland - 04-10-2019, 01:35 PM

RE: Marantz 4230 - by Ron Ramirez - 04-20-2019, 03:38 PM

RE: Marantz 4230 - by Stall-U-Rated - 04-20-2019, 04:29 PM

RE: Marantz 4230 - by EdHolland - 04-20-2019, 10:03 PM

RE: Marantz 4230 - by Ron Ramirez - 05-26-2019, 06:24 PM

RE: Marantz 4230 - by Paul Philco322 - 05-26-2019, 08:51 PM

RE: Marantz 4230 - by Eliot Ness - 05-26-2019, 09:15 PM

RE: Marantz 4230 - by EdHolland - 05-29-2019, 10:59 AM

View a Printable Version

Users browsing this thread: 4 Guest(s)

Recent Posts
Philco 16B Parts
The 16B's in the tombstone cabinet sport a 10 1/2" spkr vs the older cathedral sets which uses an 8". The p/p ...Radioroslyn — 12:58 AM
Philco 38-7 Oscillation
I have let this one sit because of other duties. Now I am back, and I have a couple of questions. I hooked up a Hammond ...tludka — 11:16 PM
Philco 38-7 Speaker
I know that when I first started working on this radio, I did not even have a speaker. Once I finally found one it was n...tludka — 11:00 PM
Philco 60 Squealing
I seem to remember eliminating a squeal by changing the IF frequency by a few KHz. Not that you should put too much tru...fenbach — 08:48 PM
Philco 42-390, code 121 speaker
These speakers pop up on eBay regularly, even if at bloated prices. Honestly, have not seen many parts on swapmeets.morzh — 08:38 PM
Philco 38-7 Speaker
The put-put is not like the speaker problem.morzh — 08:29 PM
Mission Bell Model 19A Car Radio
Hello everyone, As mentioned in my last post I was going to see if the vibrator / rectifier section could be persuaded...Antipodal — 08:21 PM
Philco 60 Squealing
Wondering if I did it backwards. If a coil was wound backwards, the oscillator would not work at all. Old school...Chas — 07:23 PM
Philco 38-7 Speaker
4-ohm speaker. Black, Green leads.tludka — 07:00 PM
Philco 42-390, code 121 speaker
#87 on the schematic. This radio had a 8" Zenith speaker attached to it when I got it. I do don't know the hist...Stevelog — 06:39 PM

Who's Online
There are currently no members online.

Login
Username:
Password:	Lost Password?
	Remember me