MHDT Havana DAC
Jan 4, 2012 at 6:53 PM Post #1,622 of 2,680

eantala

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I wish I had some experience soldering.. for now I'm a plug and play guy, I got the JW Western Electric tube and the "K" level dac chips are on the way.
 
Is the hifi  fuse upgrade worth it?
 
Jan 6, 2012 at 2:14 PM Post #1,624 of 2,680

kkqewl

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Just curious what values are those Sinkoh Tantalum replacement resistor values.......... 100 ohm for the 4 on the side of the tube and looks like 290 ohm for the two others ?
 
I just looked at my stock Havana and I have 4 100 ohm in the same location but my other two are at 25K  !!
 
 
 
 
 
So far have just switched out the stock tube for a 60's Northern Electric 396A and that was a nice step up in sonics.
 
Capacitor and power supply mods are next in addition to some resistor changes also 
 
Jan 6, 2012 at 2:26 PM Post #1,625 of 2,680

robeeert1

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Quote:
 
 
Just curious what values are those Sinkoh Tantalum replacement resistor values.......... 100 ohm for the 4 on the side of the tube and looks like 290 ohm for the two others ?
 
I just looked at my stock Havana and I have 4 100 ohm in the same location but my other two are at 25K  !!
 

 
you need for the Havana:
4 x 100R 1W
2 x 390K 1W
 

 
 
 
Jan 9, 2012 at 11:52 AM Post #1,630 of 2,680

niamex

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Guys, please stop counting the colours - it is no good for you eyes - it is easier to have a look here -
[size=8.0pt]ID[/size]
[size=8.0pt]Value[/size]
[size=8.0pt]Spec /Grade[/size]
[size=8.0pt]Parts [/size]
[size=8.0pt]R1[/size]
[size=8.0pt]301R[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R2[/size]
[size=8.0pt]100R[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R3[/size]
[size=8.0pt]1K04[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R4[/size]
[size=8.0pt]1K04[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R5[/size]
[size=8.0pt]121R[/size]
[size=8.0pt]2W, 1%[/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R6[/size]
[size=8.0pt]1K0[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R7[/size]
[size=8.0pt]1K0[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R8[/size]
[size=8.0pt]243R[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R9[/size]
[size=8.0pt]75R[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R10[/size]
[size=8.0pt]270R[/size]
[size=8.0pt]1W, 1%[/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R11[/size]
[size=8.0pt]5K62[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R12[/size]
[size=8.0pt]1K0[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R13[/size]
[size=8.0pt]270R[/size]
[size=8.0pt]1W, 1%[/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R14[/size]
[size=8.0pt]5K62[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R15[/size]
[size=8.0pt]1K0[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R16[/size]
[size=8.0pt]39R2[/size]
[size=8.0pt]2W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R17[/size]
[size=8.0pt]2k26[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R18[/size]
[size=8.0pt]1K0[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R19[/size]
[size=8.0pt]475K[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R20[/size]
[size=8.0pt]475K[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R21[/size]
[size=8.0pt]475K[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R22[/size]
[size=8.0pt]1K0[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R23[/size]
[size=8.0pt]100R[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R24[/size]
[size=8.0pt]402R[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R25[/size]
[size=8.0pt]33R2[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R26[/size]
[size=8.0pt]33R2[/size]
[size=8.0pt]0.6W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R27[/size]
[size=8.0pt]100R[/size]
[size=8.0pt]1W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R28[/size]
[size=8.0pt]100R[/size]
[size=8.0pt]1W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R29[/size]
[size=8.0pt]20K0[/size]
[size=8.0pt]1W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R30[/size]
[size=8.0pt]20K0[/size]
[size=8.0pt]1W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R31[/size]
[size=8.0pt]390K[/size]
[size=8.0pt]1W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R32[/size]
[size=8.0pt]390K[/size]
[size=8.0pt]1W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R33[/size]
[size=8.0pt]100R[/size]
[size=8.0pt]1W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]R34[/size]
[size=8.0pt]100R[/size]
[size=8.0pt]1W, 1% [/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]RL[/size]
[size=8.0pt]1K53[/size]
[size=8.0pt]0.6W, 1%[/size]
[size=8.0pt]RESISTER[/size]
[size=8.0pt]H1[/size]
[size=8.0pt]BRED[/size]
  [size=8.0pt]BRED[/size]
[size=8.0pt]H2[/size]
[size=8.0pt]BRED[/size]
  [size=8.0pt]BRED[/size]
[size=8.0pt]D1[/size]
[size=8.0pt]2A/800V[/size]
[size=8.0pt]1N5062[/size]
[size=8.0pt]DIODE[/size]
[size=8.0pt]D2[/size]
[size=8.0pt]2A/800V[/size]
[size=8.0pt]1N5062[/size]
[size=8.0pt]DIODE[/size]
[size=8.0pt]D3[/size]
[size=8.0pt]2A/800V[/size]
[size=8.0pt]1N5062[/size]
[size=8.0pt]DIODE[/size]
[size=8.0pt]D4[/size]
[size=8.0pt]2A/800V[/size]
[size=8.0pt]1N5062[/size]
[size=8.0pt]DIODE[/size]
[size=8.0pt]D5[/size]
[size=8.0pt] Led Blue[/size]
[size=8.0pt]3mm[/size]
[size=8.0pt]Led[/size]
[size=8.0pt]D6[/size]
[size=8.0pt] Led Green [/size]
[size=8.0pt]3mm[/size]
[size=8.0pt]Led[/size]
[size=8.0pt]D7[/size]
[size=8.0pt]Led Red[/size]
[size=8.0pt]3mm[/size]
[size=8.0pt]Led[/size]
[size=8.0pt]DU[/size]
[size=8.0pt]Led Yellow[/size]
[size=8.0pt]3mm[/size]
[size=8.0pt]Led[/size]
[size=8.0pt]D8[/size]
[size=8.0pt]2A/800V[/size]
[size=8.0pt]1N5062[/size]
[size=8.0pt]DIODE[/size]
[size=8.0pt]D9[/size]
[size=8.0pt]2A/800V[/size]
[size=8.0pt]1N5062[/size]
[size=8.0pt]DIODE[/size]
[size=8.0pt]D10[/size]
[size=8.0pt]2A/800V[/size]
[size=8.0pt]1N5062[/size]
[size=8.0pt]DIODE[/size]
[size=8.0pt]D11[/size]
[size=8.0pt]2A/800V[/size]
[size=8.0pt]1N5062[/size]
[size=8.0pt]DIODE[/size]
[size=8.0pt]C1[/size]
[size=8.0pt]2200U/25V[/size]
[size=8.0pt]Fine Gold[/size]
[size=8.0pt]CAPACITOR[/size]
[size=8.0pt]C2[/size]
[size=8.0pt]2200U/25V[/size]
[size=8.0pt]Fine Gold[/size]
[size=8.0pt]CAPACITOR[/size]
[size=8.0pt]C3[/size]
[size=8.0pt]2200U/25V[/size]
[size=8.0pt]Fine Gold[/size]
[size=8.0pt]CAPACITOR[/size]
[size=8.0pt]C4[/size]
[size=8.0pt]2200U/25V[/size]
[size=8.0pt]Fine Gold[/size]
[size=8.0pt]CAPACITOR[/size]
 
 
 
Cheers,
 
Jan 9, 2012 at 3:39 PM Post #1,631 of 2,680

robeeert1

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Niamex,
 
I see you're disclosing MHDT's secrets.:)
biggrin.gif

Now I'm sure some fakes will appear on the market very soon.
 
cheers,
 
 
Jan 9, 2012 at 6:54 PM Post #1,632 of 2,680

ZenFire

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Hi again.  How do I remove the op-amp from the Havana?  Also, has anyone tried, or know if it works, the Hazen mod that Steve Deckert uses in his amps?  It modifies the tube socket in a way that they are raving about on the Decware.com forums for amps and other tube gear.  Cheers!  Z
 
Jan 10, 2012 at 2:14 AM Post #1,633 of 2,680

niamex

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Quote:
Hi again.  How do I remove the op-amp from the Havana?  Also, has anyone tried, or know if it works, the Hazen mod that Steve Deckert uses in his amps?  It modifies the tube socket in a way that they are raving about on the Decware.com forums for amps and other tube gear.  Cheers!  Z


Easy, just have a good look at Robert,s posts concerning the PCM56 opamp and you will find out where to start /pin 13/. Will post a brief schematic where to go further.
Cheers
 
 
Jan 10, 2012 at 2:54 AM Post #1,634 of 2,680

niamex

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Something like that - just principle schematics -
 
the old one
 

the new one 
 

 
Please neglect the other parts and connections - I will send you the real schematics later - not completed yet,
/All above info is absolutely not a military project as the Havana schematics - you can find in the NET/.
Cheers
 
 
 
Jan 10, 2012 at 4:14 AM Post #1,635 of 2,680

ZenFire

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Thank you!  What is to be gained from removing the opamp?  And is there a need to replace the opamp feature with any other feature? 
 
By the way of contribution, if you haven't looked into the CCE/Hazen mod described in Decware forums that has to do with connecting an electrical device to 2 pegs on the tube socket, do take a look at it.  I'll ask Steve Deckert tomorrow if it works on the Havana for sure, yet I've seen in posts DIY'ers doing it on other tube equipment and raving about it.  To the point it is now built in to every Decware tube amp since mid 2009.
 
Cheers!  Z
 

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