Valve Itch phono

[neskor]

Thanks Salas I will try this when I have some free time, only problem is that Itchy sound so good right now and I don't have desire to change nothing right now 🙂

 

[merlin el mago]

Salas what difference with Itch well grounded is like day & night🙂

P.S. Could you tell me the series/model of the BHC mains filter cap are you using?

 

[Salas]

For HV the ALS30A, for LV the ALC10S Slit Foil.

 

[merlin el mago]

For HV this one 450V? ALS30A221DB450 - BHC COMPONENTS - CAPACITOR, 220UF 450V | Farnell España

Where did you bought the slit foil: audiocap or DNM? BTW didn't see any 4700uF 25V...

 

[Salas]

Yes that one 220uF is good. Now its under KEMET group. For LV there is only 10000uF Slit Foil from AudioCap. No other value. I have used in some builds. For 4700uF Nichicon.

 

[merlin el mago]

Thanks Salas, I will order the HV cap.

 

[Salas]

If talking for the heaters you can combine any BHC line with 4700uF/25V of same lifetime and looks. To make a nice package.

 

[stajo]

Being away on autumn holiday I had no other tools then paper and pen so I made a physical layout on how a combined Itch+6V6 pre could look like. One channel only, the other gets mirrored. Some rcrc to go also.

 

[Salas]

Looks like a valid plan. Since all the builds here were about the Itch stages alone and mainly built with in-line ground bus, you will be making a novel package. OTOH no stock experience on grounding or other details you may encounter, but you are veteran on such, no worries.

 

[stajo]

veteran on such

Subtile innuendo🙂

 

[Salas]

I meant positively, as you will progress it will pan out.

 

[stajo]

Thanks buddy. I was merely thinking about this http://www.diyaudio.com/forums/tubes-valves/102352-6v6-line-preamp-203.html . But Metaxa solved it😀

 

[merlin el mago]

Salas what do you think to use 600 ohms LCR RIAA in place of RC RIAA? I'm sorry for my newbie question: will be more complicate to change? what do you think of these inductors LCR-RIAA

 

[Salas]

Not in this circuit, the 1st stage can not drive it with the proper current swing.

 

[neskor]

I asked the same question in this tread, check here:
http://www.diyaudio.com/forums/analogue-source/140635-valve-itch-phono-152.html#post3680699

 

[Salas]

You having the parts and the curiosity you may experiment, but principally I would not recommend this circuit for driving LCR to anybody not having time and money to much possibly dump...

 

[merlin el mago]

Thanks

 

[merlin el mago]

Salas could you tell me the output impedance?

 

[Salas]

About 800 Ohm.

 

[merlin el mago]

Thank you.