It is currently Mon Mar 16, 2020 5:49 pm

All times are UTC - 7 hours



Post new topic Reply to topic  [ 34 posts ]  Go to page 1, 2, 3  Next
Go to page 1, 2, 3  Next
Author Message
Post subject: Multi- cap cans
Posted: Sat Jan 04, 2014 12:41 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Thu Dec 12, 2013 2:54 pm
Posts: 619
I have a couple of amps that have been sitting for the last 30 years, one of which is a '61 6G2 Princeton. I'm not going to even think about trying to power either of these amps before replacing all the electrolytics and changing to 3 prong power cords. My question relates to CE cap cans and their tolerance ratings. How much chance is there of the capacitance ending up being closer to the +50% side, and being too much for a 5Y3 rectifier?

Wondering about other's experience with these caps, if any.

Thanks in advance.

vinyl

_________________
"Where confusion abounds, there's money to be made."


Top
Profile
Fender Play Winter Sale 2020
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 12:54 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
I've had extremely good luck with the CE cap cans as replacements for Champs and Princetons. Most measured close to dead-nuts accurate specs prior to installation and thus far they've proven to be pretty durable.

This one should work perfectly in your 6G2......

http://www.tubesandmore.com/products/C-EC30-30-30-10

(leave the 10ufd section unused).

Note that the VDC rating is 475 -- a skosh higher than the Princeton schematic specifies but it will better tolerate today's higher wall-socket voltages. Your 5Y3 will be fine.

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 1:07 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Thu Dec 12, 2013 2:54 pm
Posts: 619
Thanks Arjay,

When I get ready, I'll probably post a thread about it with pictures when I start work on it. The other amp is a Bandmaster Reverb, and they are both a little rough. I just want to get them working. I'll have some other questions later.

I'm very impressed by the amount of experience available by the "regulars" in this forum, and how willing they are to help out. I've learned a lot lurking in here over the last few months.

(Some of your comments have been classic, by the way.)

Thanks again,

Bill


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 2:14 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
The BMR offers some real alternative possibilities, Bill.

F'rinstance, it can easily be converted to a combo -- a Super Reverb clone, a Vibroverb clone, or a Pro Reverb near-clone. The SR and VV share their chassis dimensions with the BMR (unless yours is the ultra-linear version).

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 2:28 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Thu Dec 12, 2013 2:54 pm
Posts: 619
Yeah, I'm considering that. It's a '69, (according to the serial number and transformers) but I haven't opened it up yet to see what circuit it actually is. The tube chart is gone, but they're notoriously inaccurate, especially around that time. I'm kinda a geezer, so I probably won't be doing a super, OT not right anyway. Don't want anything too heavy.

Bill


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 2:43 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
Two circuit possibilities, Bill -- the AA568 (if the amp is early '69) or the AA1069 (if manufactured late in the year). Sonically, the latter revision is preferable but either can be converted to pseudo-blackface specs by rearranging some chassis "furniture". If original, your output tranny will have a 4-ohm secondary. They're great amps and with the smallish OT they "give it up" at significantly lower volume levels than a Super Reverb.

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 4:19 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Thu Dec 12, 2013 2:54 pm
Posts: 619
No drip edge, I'm hoping it's a AA1069, less clutter around the power tubes. Right now I'm leaning towards a Vibrolux reverb, or maybe a brown Vibroverb. Serial number is 40981, so it may be the AA768. Whatever it is, I'll be happy. Shouldn't be too hard to change.

Right now, it's a candidate for a complete re-cap and 3 prong power cord.

Bill

_________________
"Where confusion abounds, there's money to be made."


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 5:55 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
Don't forget to ditch the death cap -- you won't need it once a grounded 3-conductor power cable has been installed.

How about some pics of your 6G2, Bill?

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 7:59 pm
Offline
Rock Star
Rock Star
User avatar

Joined: Sat Jul 03, 2010 2:18 pm
Posts: 6544
" How much chance is there of the capacitance ending up being closer to the +50% side, and being too much for a 5Y3 rectifier? "

I find that direct-heated rectifiers, like the 5U4GB and 5Y3GT, are much more tolerant of capacitance -- than indirect-heated (like the GZ34/5AR4). Though I would not go much above 40-60 mfd, for the first filter stage.

I like the 525VDC rated CE over the 475VDC for all the Princeton and Champ line. Much more electolytic fluid. Which should lead to longer life. Just my peccadillo. :lol:

http://www.tubesandmore.com/products/C-EC30X3-525


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sat Jan 04, 2014 8:43 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
BMW2002Ti wrote:
http://www.tubesandmore.com/products/C-EC30X3-525


This one's a skosh taller, physically. Watch for clearance issues if using it in an amp with a non-standard speaker. Otherwise, it's a great cap can too.

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sun Jan 05, 2014 11:04 am
Offline
Aspiring Musician
Aspiring Musician

Joined: Thu Dec 12, 2013 2:54 pm
Posts: 619
Retroverbial wrote:
Don't forget to ditch the death cap -- you won't need it once a grounded 3-conductor power cable has been installed.

How about some pics of your 6G2, Bill?

Arjay

Well, here's the death cap in the 6G2 :lol: Image
Image

_________________
"Where confusion abounds, there's money to be made."


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sun Jan 05, 2014 11:05 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
Yipe, somebody stole that little guy's knobs!

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sun Jan 05, 2014 11:05 am
Offline
Aspiring Musician
Aspiring Musician

Joined: Thu Dec 12, 2013 2:54 pm
Posts: 619
Image
Image
Image

_________________
"Where confusion abounds, there's money to be made."


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sun Jan 05, 2014 11:07 am
Offline
Aspiring Musician
Aspiring Musician

Joined: Thu Dec 12, 2013 2:54 pm
Posts: 619
ImageImageImage

_________________
"Where confusion abounds, there's money to be made."


Top
Profile
Post subject: Re: Multi- cap cans
Posted: Sun Jan 05, 2014 11:08 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
That amp definitely has some history -- the stories it could tell.

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 34 posts ]  Go to page 1, 2, 3  Next
Go to page 1, 2, 3  Next

All times are UTC - 7 hours

Fender Play Winter Sale 2020

Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to: