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PostPosted: 26 Apr 2010, 21:16 
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Joined: 26 Apr 2010, 21:08
Posts: 42
I've decided to take on Brad's 6v6 push pull tube amp for a project. One question, does it hurt to use 1/2 watt resistors or are the 1/4 watt resistors necessary per the schematic?

Thanks, Brian


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PostPosted: 27 Apr 2010, 05:55 
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Joined: 28 Oct 2009, 02:34
Posts: 501
Location: Utrecht Nederland
Hi Brian,

no it won't hurt. I use 2 watt resistors standard, just because they are bigger and easier to work with. Go ahead and have fun.

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Greetings from Holland, Ben

My DIY Audio Projects:
- Single-Ended 12B4A tube amp with ECC802S driver
- DIY Push-Pull KT88 tube amp (OddWatt amp from scratch)
- 832 / GU32 tube push-pull amplifier project


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PostPosted: 27 Apr 2010, 17:31 
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Joined: 10 Sep 2009, 16:06
Posts: 72
Location: Sweden, Båstad
Basically you can always use resistors classed for a higher wattage (If they fit, as they will likely be bigger.) without a problem but be very careful if you for some reason use a lower wattage as this could in a worst case scenario cause fires (Otherwise you just end up looking stupid with a house full of a horrible stench of torched electronics.) I've tried this by accident in school at some point. My suggestion is follow the schematic or if you drew it make sure you do the math (and then exaggerate) before you begin wiring.

/Ebbe

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"I've done this a thousand times befo..." on not voltage testing before getting to work.
"I'm gonna take my time on the next amp....." on First tube project.


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PostPosted: 27 Apr 2010, 21:06 
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Joined: 08 Aug 2009, 03:11
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Location: Chilliwack, BC
Bennybuis wrote:
I use 2 watt resistors standard, just because they are bigger and easier to work with.

My middle aged eyes appreciate this logic :D

Cheers!

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* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
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PostPosted: 28 Apr 2010, 00:21 
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Joined: 02 Jan 2010, 22:41
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Ace - nice to see someone else doing this project.

I have all the parts and am about to drill the chassis on the weekend.
I’ve added a feedback selector switch, volume pot and another set of inputs.

Will post further as it develops!


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PostPosted: 28 Apr 2010, 07:28 
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Joined: 26 Apr 2010, 21:08
Posts: 42
Thanks for the clarification on the resistors. I figured that was the case, I plan on keeping the values the same for the resistors and capacitors just using a higher wattage and voltage. I never plan to use a smaller rating unless I want my own minature bonfire. :hot:

I am glad to see someone is doing this project as well. I been thinking about building a tube amp for a while but I am limited on design capibilities. I am more a read the schematic and build it, part for part kinda guy. I do have experience in working in some repair and building of electronic equipment, just not the design stage.

I am building this amp with Hammond Transformers, ERSE caps, JJ and Tung-Sol tubes and Takman resistors. :D I hope that isn't too over the top.

Take care everyone and thanks again...


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