Bottlehead Forum

Bottlehead Kits => BeePre => Topic started by: Jimb0 on February 03, 2025, 03:34:44 PM

Title: BeePre 2 Voltage Check Terminal 1 and 11
Post by: Jimb0 on February 03, 2025, 03:34:44 PM

Hello. I just built a BeePre2 with output and TwoQuiet upgrade. All voltages checked out except for terminals 1 and 11. I'm getting a reading of 220V on each terminal.

Title: Re: BeePre 2 Voltage Check Terminal 1 and 11
Post by: Jimb0 on February 03, 2025, 04:10:41 PM

pics

Title: Re: BeePre 2 Voltage Check Terminal 1 and 11
Post by: Paul Birkeland on February 03, 2025, 05:53:50 PM

Quote from: Jimb0 on February 03, 2025, 03:34:44 PM

I'm getting a reading of 220V on each terminal.

What was the expected value?

Title: Re: BeePre 2 Voltage Check Terminal 1 and 11
Post by: Jimb0 on February 04, 2025, 04:54:36 AM

I think I figured it out. I was looking at the TwoQuiet manual when I tested the voltages for Terminals 1 and 11. This was after I added the 5w 22ohm and 270ohm wirewound resistors between 31-39. By adding these resistors in parallel with the existing resistors, this should increase the voltage because the voltage drop will be less on those resistors. Am I correct?

My other question what does the B+ Raw mean in the output manual upgrade?

Title: Re: BeePre 2 Voltage Check Terminal 1 and 11
Post by: Paul Birkeland on February 04, 2025, 06:10:24 AM

Yes, the added resistors in the power supply bump up the raw B+ a bit so it will work better with the hybrid shunt regulator circuit.  B+ raw just means the B+ before regulation.

Title: Re: BeePre 2 Voltage Check Terminal 1 and 11
Post by: Jimb0 on February 04, 2025, 07:22:00 AM

Thank you PB!