Bottlehead Forum
Bottlehead Kits => Crack => Topic started by: FrancoB on August 05, 2010, 09:39:04 AM
-
Ok, I finished my Crack. I had a lot of fun soldering this kit. This was my first point-to-point project.
My compliments to Doc B. The manual was spot on. Haven't seen one that was so meticulous.
This was my fourth tube project. Before this one I did a KT88pp, a 6C33Cse and a 5687pre). I couldn't get the KT88 to work. A World Audio Design from the UK. Although it was PCB-based, I couldn't get it to make some music. Very frustrating. I liked the PCB a lot. I had some troubles fitting everything in around the transformer. I would still prefer a PCB-design for a next project.;)
Anyways, when doing the voltage check on the crack there were no huge differences. Most of them were within 1%. Except for the 90V points. I can't measure more than 76V on these points. It's more than 15% off. Not much, but still.
Is this alarming? Not?
Ok, I'm gonna do the final voltage check on the headphone jack.
Talk to you later.:)
-
Sorry, I don't have a Crack headphone amp. Doc made me say that. But I'm interested in the 6C33C amp. Please PM me with some info. I have a pair that I thought would be a great SET.
On the other hand, low voltage won't harm a thing. So if all other voltages are good, listen and decide for yourself.
-
I decided to finish the test on my Crack by plugging in my HD600 and listen to some music.
It works. Amazing. You must know that I don't have an engineering background. It's just painting by numbers for me. Soldering by numbers.
It's dead quiet! I can't believe it. Normally there's always something wrong when you fire it up for the first time. Hum. Not this time. This proves that the design is a Level 1 kit. :D
Thanks Doc.
-
Hey Franco,
I would imagine that those voltages may fall into line when the tubes have some burn in time, especially the 12AU7.
Glad to hear everything works!
-PB