Slightly high B+ Voltage?

hmbscott · 489

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Offline hmbscott

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on: May 07, 2025, 03:23:28 PM
Just completed my Moreplay Upgrade Kit install and have a slightly high B+ VDC value. I noticed it was rising with time initially but nearly stabilized after 10 minutes.

All voltages measured at 10 minutes after powering on except as noted:

My line voltage: 127.5 VAC
All LED's noted ON
"A" socket heater voltage: 6.28 VDC (measured on PCB at h2 + & -)
"B" socket heater voltage: 6.25 VDC (measured on PCB at h1 + & -)
Terminal 6: 135.9 VDC
Terminal 16: 138.7 VDC
B+ on PCB: 187.4 VDC

B+ with time
Minutes Volts
0 min    181.1VDC
2          185.4
4          186.7
6          187.2
8          187.4
10        187.5

I noted that the heater voltages were very stable between T=0 and 10 min.
Terminals 6 and 16 increased a few volts between T=0 and 10 min.

I'm assuming this is OK, but I thought I would run it past you.

Scott
[U-Turn Theory > Hana MH > Eros II] & [iMac M1 Apple Music lossless/hi res > HQPlayer > Denafrips Ares II] >> Moreplay >> Stereomour II >> Hsu ULS-15 Sub & DIY DML Speakers
Moreplay 2nd out >> [Crack + Speedball > HD 650]


Offline Paul Birkeland

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Reply #1 on: May 08, 2025, 07:52:14 AM
Not a problem, your line voltage is just a bit high.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline hmbscott

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Reply #2 on: May 10, 2025, 06:33:19 PM
Thanks Paul!  And, it sounds awesome. I aLeo upgraded the output caps to Audyn Copper. The caps are breaking in, but the upgrade kit sounds amazing! Deeper bass, extended highs, more detail, more musical, sound stage is beautiful, and it sounds even more beautifully lush and luxurious. The film cap on the board is one of the old output caps, Auden Cap Plus.

Scott
[U-Turn Theory > Hana MH > Eros II] & [iMac M1 Apple Music lossless/hi res > HQPlayer > Denafrips Ares II] >> Moreplay >> Stereomour II >> Hsu ULS-15 Sub & DIY DML Speakers
Moreplay 2nd out >> [Crack + Speedball > HD 650]