[sachu]

Ok, with the tube 80V makes sense. Check output voltage of the 24V regulator next. Then measure voltages of the TLE rail splitter (be careful not to short things out when poking around there). All measurements wrt G.
 
 
YOur HV and heater is fine. Now to cehck your LV, start from regulator, then rail splitter then buffer stage and finally E12.

 

[Lil' Knight]

Almost done populating the board but found out I missed the D1L, D1R, D2L, D2R, relay, L2H and the ICH.
Anyone happens to have those on hands? Neither Mouser nor Digikey has all of them, just don't want to make 2 orders for those small parts.

 

[revolink24]

Could someone either describe to me or show me a photo of the correct orientation of Q1P (the TO-126)? I'm a bit shaky on it, and since both my boards are exhibiting the same problems, I fear I may have accidentally reversed it.

 

[BK_856er]

 
Quote:

Could someone either describe to me or show me a photo of the correct orientation of Q1P (the TO-126)? I'm a bit shaky on it, and since both my boards are exhibiting the same problems, I fear I may have accidentally reversed it.

First post, page #1, image from mullet?
 
BK
 

 

[revolink24]

Sorry, can't really tell from that picture.

 

[cfcubed]

One way to do this is to ID the Emitter, Base & Collector for the device, consult the schematic:
http://www.cavalliaudio.com/diy/ctha/main.php?page=schematics/psschematic
then look at the PCB traces to other devices.
Another way is to see the gray dot indicator on it (top/PCB-edge) in my "last PCB spec image" on the 1st page of this thread, the device may have that dot indicator on it (hint: its the emitter).

 

[revolink24]

Thanks, that helped a lot.

 

[Mullet]

So it's been several months now since we've begun building our CTH Rev As... I'm curious as to how many people have built theirs and if you're keeping them or giving (selling) them away. I've built both of mine and have no intentions on selling or getting rid of either. The only blasphemous thing thing I'm thinking of doing is possibly building an EHHA Rev A in the next 2 years. At that point I'll decide what I intend to do with the two I've got. Other than that I have a La Figaro 332C that I'm conflicted about. It seems to have slightly more sound stage and separation over my CTH with Sonicap Gen IIs. However, I don't know if I can justify keeping it as it's taking up a bunch of desktop space and isn't really that much better than the CTH. 

 

[cfcubed]

It's funny you'd post that Mullet as I've 3 CTHs now & I guess that's one too many so I will be selling one.  With 6 headamps total & an EHHA in progress think I can give one up

 

[sinae]

Im interested in building this diy but filtering all the tweak mods in forums posts might complicated for a beginner like me

Anybody is selling kits of the new CTH revA with all added modifications?? Or at least PCBs (digikey?)

Or anybody have a list of those possible revA mods discussed on headfi..

Also im looking for an hybrid with total black background with no hisses,no hums, no crackles when no music is playing at mostly any volume..

also no popping..

Does any of yours CTH doing any of this..
Does the CTH has integrated ground loop protection.. if that is possible?

Anybody thought of adding some internal 3-6 band bypassable EQs, since its an hybrid with opamp ( or to soha II and EHHA)

On the CTH rev A plan maker

the notes are
* Consider SIP socketing R8L & R8R, R18L & R18R for flexibility
* Consider TO92 heatsinks (e.g. Digikey HS251-ND) on BC3X7s - should not be needed
* 24V reg small heatsink do not contact case or other components
* Consider 1k resistor from VG to real ground to distribute e12/relay current across rails?
* Consider mounting holes for non-slotted case use
* DO NOT SUBSTITUTE OTHER CLASS BC DEVICES!!!!

anybody wanna comment or add to this list?

 

[kchapdaily]

Quote:

Im interested in building this diy but filtering all the tweak mods in forums posts might complicated for a beginner like me

Anybody is selling kits of the new CTH revA with all added modifications?? Or at least PCBs (digikey?)

Or anybody have a list of those possible revA mods discussed on headfi..

Also im looking for an hybrid with total black background with no hisses,no hums, no crackles when no music is playing at mostly any volume..

also no popping..

Does any of yours CTH doing any of this..
Does the CTH has integrated ground loop protection.. if that is possible?

Anybody thought of adding some internal 3-6 band bypassable EQs, since its an hybrid

with opamp ( or to soha II and EHHA)

On the CTH rev A plan maker

the notes are
* Consider SIP socketing R8L & R8R, R18L & R18R for flexibility
* Consider TO92 heatsinks (e.g. Digikey HS251-ND) on BC3X7s - should not be needed
* 24V reg small heatsink do not contact case or other components
* Consider 1k resistor from VG to real ground to distribute e12/relay current across rails?
* Consider mounting holes for non-slotted case use
* DO NOT SUBSTITUTE OTHER CLASS BC DEVICES!!!!

anybody wanna comment or add to this list?

 

i was considering building a cth recently. but i discovered there are no more pcb's available you might be able to find an individual forum member willing to sell you one though
 

 

[sinae]

I think im gonna buy an already made cavalli hybrid amp. anybody wanna sell for good price?

 

[Mullet]

Sinae~
 
You might be in luck finding one... It looks like cfcubed is going to be selling one of his 3... I'd send him a PM and see if one is up for sale.

 

[sinae]

just bought a SOHA II built from another headfier.. might build my own CTH revA eventually

 

[sharkz]

Does anyone currently have a finished CTH for sale? Looking to pick one up now to power my Grados and Fostexes. Please PM me if you are willing to sell one. Thanks.