Vintage HiFi Audio Forum

Audio Discussion => TUBES TUBES TUBES => Topic started by: BrianT on April 15, 2012, 06:03:50 PM

Title: Silver Sevens Capacitor Change
Post by: BrianT on April 15, 2012, 06:03:50 PM: My set of Silver Seven's developed a loud pop (really loud) when I turned the amp off.
Even with the the level control turned all the way down and the pre amp turned off.

As I did not want to damage my speakers, I had to get it taken care off ASAP. Quick phone call to Bob Carver.
Bob gave me a couple of things to check out, one of them was a couple of caps that ground out the 660vdc B+ line.

So after checking them I found one was weak, time to change the caps. There are 3 of these caps in each amp so I ordered
6 x Jensen Audio Grade 47uf 450vdc caps. ( originals where Mallory (date code Sept 1989) 50uf 450vdc)
Chris at Parts Connexion told me the slight difference in values would not matter.

Due to the large size of the case, it turned out to be a very easy job, 30 mins per mono block.

After a quick test, all works fine. No pop's now ;D ;D ;D

Brian
Title: Re: Silver Sevens Capacitor Change
Post by: tinpan on April 15, 2012, 06:07:56 PM: Look how nice those are under the skin. Are you good to go for another 20 years now?
Title: Re: Silver Sevens Capacitor Change
Post by: BrianT on April 15, 2012, 06:32:26 PM: Quote from: tinpan on April 15, 2012, 06:07:56 PM
Are you good to go for another 20 years now?

Robin.

I am sure there are a couple more caps that will need changing, I will talk to Bob at CF12
and find out which ones.

How are the Cherries doing?

Brian
Title: Re: Silver Sevens Capacitor Change
Post by: Kingman on April 15, 2012, 06:36:48 PM: Brian... They look great and bet they sound better! Robin... congrats on the 180 purchase!!!! :D
Title: Re: Silver Sevens Capacitor Change
Post by: OldiesButGoodies on April 15, 2012, 07:28:12 PM: Great job!
Title: Re: Silver Sevens Capacitor Change
Post by: Reverend on April 15, 2012, 09:52:47 PM: It's pretty sweet you can get tech support from the Bobfather. :o
Title: Re: Silver Sevens Capacitor Change
Post by: OCCD on April 16, 2012, 11:07:25 AM: Nice job, Brit!
Title: Re: Silver Sevens Capacitor Change
Post by: BrianT on April 16, 2012, 06:16:08 PM: Quote from: Reverend on April 15, 2012, 09:52:47 PM
It's pretty sweet you can get tech support from the Bobfather. :o

Agreed
Title: Re: Silver Sevens Capacitor Change
Post by: OldiesButGoodies on April 16, 2012, 07:42:09 PM: Agree with Rev - you have direct access to the Pope!
Title: Re: Silver Sevens Capacitor Change
Post by: tinpan on April 17, 2012, 07:56:32 PM: Brian,

The cherry's are doing great.

Wayne, thanks. :)

(http://images61.fotki.com/v219/photos/6/111916/8324195/IMG_5641-vi.jpg)

I finished making the amp stands for them yesterday.

Total cost in amp stands $24 bucks
Title: Re: Silver Sevens Capacitor Change
Post by: Kingman on April 17, 2012, 08:25:38 PM: Quote from: tinpan on April 17, 2012, 07:56:32 PM
Brian,

The cherry's are doing great.

Wayne, thanks. :)

(http://images61.fotki.com/v219/photos/6/111916/8324195/IMG_5641-vi.jpg)

I finished making the amp stands for them yesterday.

Total cost in amp stands $24 bucks
...Man that is FN sweet!!!! Looking good Robin!!!! Brian, post some pics of that system of yours for us to drool over.... ;)
Title: Re: Silver Sevens Capacitor Change
Post by: Sir Thrift-a-Lot on April 18, 2012, 08:43:13 AM: Is that LaScala white or is that just flash reflection?
Title: Re: Silver Sevens Capacitor Change
Post by: Reverend on April 18, 2012, 10:06:28 AM: As the Canadians would say, "Beauty eh!"
Title: Re: Silver Sevens Capacitor Change
Post by: BrianT on April 18, 2012, 06:27:59 PM: Quote from: Kingman on April 17, 2012, 08:25:38 PM
Brian, post some pics of that system of yours for us to drool over.... ;)

Wayne.

I'm embarrassed, looking at Tinpan's setup. My setup does not look anything as nice
I have 9 components pilled up on 2 target stands.

But just for you here we go.

Brian
Title: Re: Silver Sevens Capacitor Change
Post by: BrianT on April 18, 2012, 06:29:14 PM: Quote from: tinpan on April 17, 2012, 07:56:32 PM
Brian,

The cherry's are doing great.

Wayne, thanks. :)

(http://images61.fotki.com/v219/photos/6/111916/8324195/IMG_5641-vi.jpg)

I finished making the amp stands for them yesterday.

Total cost in amp stands $24 bucks

Robin.

Looks so nice, great amp stands.

Brian
Title: Re: Silver Sevens Capacitor Change
Post by: Kingman on April 18, 2012, 06:31:24 PM: Quote from: BrianT on April 18, 2012, 06:27:59 PM
Quote from: Kingman on April 17, 2012, 08:25:38 PM
Brian, post some pics of that system of yours for us to drool over.... ;)

Wayne.

I'm embarrassed, looking at Tinpan's setup. My setup does not look anything as nice
I have 9 components pilled up on 2 target stands.

But just for you here we go.

Brian
I think you got a great system...you should have included those B&W's!!! Every piece in your system spells class..... 8)
Title: Re: Silver Sevens Capacitor Change
Post by: Zoot Horn on April 18, 2012, 06:44:37 PM: Congrats Brian--nice work indeed.
Title: Re: Silver Sevens Capacitor Change
Post by: BrianT on April 18, 2012, 07:27:49 PM: Quote from: Kingman on April 18, 2012, 06:31:24 PM
Brian
I think you got a great system...you should have included those B&W's!!! Every piece in your system spells class..... 8)

Wayne.

As requested, here they are.
Title: Re: Silver Sevens Capacitor Change
Post by: MasterBlaster on April 18, 2012, 09:33:30 PM: Awesome!
Title: Re: Silver Sevens Capacitor Change
Post by: tinpan on April 19, 2012, 02:38:34 PM: Quote
I'm embarrassed, looking at Tinpan's setup. My setup does not look anything as nice
Funny that you say that, that is what I think when I look at your system. What you don't see if the mess on the other wall. :laugh:

Quote
Is that LaScala white or is that just flash reflection?
Yes, that is a white Lascala, it was in a church hanging from the ceiling. I was going to refinish it but I knew if I waited long enough chabby chic (SP?) :P would come back in style.

Brian, those speakers look awesome