Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Canezila on April 30, 2024, 10:15:35 am
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Hi. I have been building my first tube amp. The robrobinette.com ef80 slo micro. I have a question regarding v5. Would pin 4 (and pin 5) be heater pins? I didn't see pin 5 labeled as used but in all other of the micro ef80 builds it is. Can I get confirmation on this? Thank you.
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Assuming you're using EF80's, then yes pins 4 and 5 are the heater pins.
If you peruse the schematic, looking at the power section at the bottom, you can see how they are connected.
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Thanks for the response. I figured as much. If you look at what I am attaching, it doesn't show it being attached. I didn't know if it was intentionally missing.
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Its also helpful to look at tube data for an EF80
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When you crank out as many nice layouts as Rob has, you're bound to make a tiny error. I know I do.
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Its also helpful to look at tube data for an EF80
I am not complaining or anything like that. I am very grateful for all the information that Rob Robbinette has provided. I looked at that diagram and it helped me to realize I need to look into this further. So I asked that question because I am, in fact, very new to building tube amps.
This is my first build. I know nothing. I am wanting to learn and build an amp I love. All I am doing is trying to figure out why my build is not working. Probably because I so new to this that my build is garbage. I am going to rewire my ht because it looks bad. I bought better wire and better tube sockets.
I am enjoying this process. It is going to take a few builds under my belt to get a solid grasp on things.
Everyone, please understand, (and it's hard to get the gist when reading black and white text), that I am completely grateful for any help and all the amazing work and knowledge that Rob Robbinette has provided. It's amazing. I hope I am explaining myself better.