cap job myself

HIWATT amps from the Hylight Electronics era

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jujub
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cap job myself

Postby jujub » Fri May 02, 2014 2:41 pm

Hi, guy , think I need a cap job for my '74 HIwatt SA212 (background noise 50hz).

I want to do I myself... is there any thing to know before ( discharge caps?)

thank you :D

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mhuss
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Re: cap job myself

Postby mhuss » Fri May 02, 2014 3:26 pm

As long as the amp is unplugged and off for 20 minutes or more, the caps should all be discharged. All Hiwatts have 220k balancing resistors across the power supply caps that also act to discharge the caps after power is removed.

The plastic-insulated wire melts pretty easily, so don't heat the solder joints for too long. :wink:

--mark

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jujub
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Re: cap job myself

Postby jujub » Fri May 02, 2014 4:17 pm

thanks for answering'

Where should I buy a recap set ?

Is HI tone enable to provide (sell) me one? should I go for a European shop instead? which one? :D

tWreCK
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Re: cap job myself

Postby tWreCK » Fri May 02, 2014 4:38 pm

Vintage Hiwatt Restorations ie Hi-Tone online shop used to have recap kits for vintage Hiwatts - not sure if they still do? Status says out-of-stock - don't know if it's temporary or they'll be back in stock soon.......

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Dr.HI-TONE
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Re: cap job myself

Postby Dr.HI-TONE » Fri May 02, 2014 7:42 pm

try Tube Amp Doctor in Germany
they should have the caps you need.
http://www.HI-TONE-Amps.com

HI-TONE, when only the best will do.

DR-F

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jujub
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Re: cap job myself

Postby jujub » Sun May 04, 2014 7:04 pm

thanks....will there caps set from hi-tone anymore?

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teethdream
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Re: cap job myself

Postby teethdream » Sun May 04, 2014 9:49 pm

jujub wrote:thanks....will there caps set from hi-tone anymore?


I was actually wondering that same thing myself... I was going to order a set of caps from Hi-Tone for my DR201 to replace the JJ caps that are inside it right now next pay.

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Dr.HI-TONE
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Re: cap job myself

Postby Dr.HI-TONE » Sun May 04, 2014 10:26 pm

probably not.
it isn't worth the hassle, especially when sending them outside the USA requires a trip to the Post Office.
We are focusing on amplifiers and speaker cabinets.
http://www.HI-TONE-Amps.com

HI-TONE, when only the best will do.

DR-F

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teethdream
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Re: cap job myself

Postby teethdream » Sun May 04, 2014 10:33 pm

Dr.HI-TONE wrote:probably not.
it isn't worth the hassle, especially when sending them outside the USA requires a trip to the Post Office.
We are focusing on amplifiers and speaker cabinets.


That makes a lot of sense. Do you have a particular brand you reccomend?

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Dr.HI-TONE
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Re: cap job myself

Postby Dr.HI-TONE » Sun May 04, 2014 10:42 pm

F&Ts sound the best and are the highest quality.
ARS and TAD caps are "okay" but are made in Taiwan and the quality is questionable.
JJ's are good quality, but sound brittle to me.

of course if you end up picking up the SE3120's I can send you home with a set. :D
http://www.HI-TONE-Amps.com

HI-TONE, when only the best will do.

DR-F

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jujub
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Re: cap job myself

Postby jujub » Mon May 05, 2014 6:33 am

thanks so I'll probably go for F&T.

as my amp is an SA212 Which cap should I buy? theses:

(1) 50uf + 50uf 500v Can -
(1) 100uf 100v Axial -
(3) 220uf 450v Cans -
(1) 16uf + 32uf 500v Can.

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Dr.HI-TONE
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Re: cap job myself

Postby Dr.HI-TONE » Mon May 05, 2014 1:08 pm

those would work.
The bias cap my be a 150uf in your amp, you may want to check your original caps before ordering new ones.
http://www.HI-TONE-Amps.com

HI-TONE, when only the best will do.

DR-F

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jujub
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Re: cap job myself

Postby jujub » Wed Jul 15, 2015 2:17 pm

Cap job donne at last.

But I found the bias cap is 250uF :shock: ... is this or ok?

Since I left the original tube i didnt change the original...Is this safe?

Thanks
Last edited by jujub on Wed Jul 15, 2015 7:33 pm, edited 1 time in total.

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mhuss
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Re: cap job myself

Postby mhuss » Wed Jul 15, 2015 5:19 pm

Increasing the bias cap value is fine, and won't change the sound.

Tubes - depends on what shape they're in more than how old they are. Preamp tubes last almost forever, but power tubes eventually get weak. Not unsafe, but they produce poor sound.

--mark

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jujub
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Re: cap job myself

Postby jujub » Wed Jul 15, 2015 7:34 pm

i 've edited my post..sorry for my english


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