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Old 24th November 2012, 05:10 PM   #291
miepa is offline miepa  Austria
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does anyone know where i can get
147k - 0,1%
Vishay CMF55,60 or RN65


Thank you!
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Old 24th November 2012, 05:42 PM   #292
Marra is offline Marra  United Kingdom
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Farnell do these

RC55Y 147K 0.1% - WELWYN - RESISTOR, 0.25W 0.1% 147K | Farnell United Kingdom
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Old 24th November 2012, 06:16 PM   #293
pdul is offline pdul  Denmark
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Quote:
Farnell do these

RC55Y 147K 0.1% - WELWYN - RESISTOR, 0.25W 0.1% 147K | Farnell United Kingdom
I have used those too, except i bought it from RS
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Old 24th November 2012, 06:19 PM   #294
pdul is offline pdul  Denmark
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Just dont say it out loud, that it isnt Vishay. If the RIAA doesnt know, it will probably work anyway.
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Old 24th November 2012, 08:04 PM   #295
Marra is offline Marra  United Kingdom
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I won't tell if you don't
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Old 26th November 2012, 07:16 AM   #296
hesener is offline hesener  Germany
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Quote:
Originally Posted by Bksabath View Post
On matching
I tried litle (big) Atals unit and mesure low
Tried curve tracer (but don't trust it) and Example get 563
Tried circuit published on build guide and mesure example 555

Litle circuit there is prety good.....
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Old 27th November 2012, 06:02 PM   #297
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Got a S...T load of BC327-40 Original Fairchild with HFE hiegher than 540
This mesured with "litle big circuit" at 5 V 20 C

Same go up to the 600 and wuld like to swap for same Hi (hef more than 550) BC337

Also If you stuck give us a PM
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Old 29th November 2012, 01:00 PM   #298
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I got few PM about the transistors.
Same questions would be helpful to general population so I am going to post replies here
1 1to help
2to live replies open to constructive comments, as I don't know much
3 I am going to use spel cek in public

Up to you if one decide to make intelligent questions useful for everybody

Before we start
Group buy for components was really big help (I subscribed to it as well); one can build paradise with those no problems and be really happy whit it (be prepared to ditch old TT and Cart as R2 version that I am listening at present as beta builder is pretty good)

So I am in no way saying that one can't do it with what is supplied all I am saying is that maybe if you got time (loads of it and easy as I have paradise R2 up and running ) and same cash there are options to make things a little bit better.

Q: wuld you match just the transistors how

I am going to match the Jfets as well
Paradise is ok without to much fussing about but if you can match it will be better

For matching use the 5 volt circuit as published and match groups as in the build guide.

Mouser sells BC327-40 BC337-40 for 22 for 500 0r 30 for 1000

How many you get depends on your pockets, if you could find same friends to share be better.

If you can get them on ammo pack (Taped together) you are more likely to have closer Hfe match

Then once you got them if you are lucky you get hi Hfe as specification say Hfe between 250 and 630 for the 40 type.

All the best
Sandro

Ps Your question could be useful to all if ok with you why not post on forum?
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Old 29th November 2012, 02:51 PM   #299
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I traded transistors with pdul without problems.
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Old 29th November 2012, 04:07 PM   #300
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Quote:
Originally Posted by Bksabath View Post
Up to you if one decide to make intelligent questions useful for everybody
As i had the chance to talk to Joachim about this issue,
i learned it is not usefull to spill the highest hfe all over the place.
As far i can remember the highest 8 with good match have to go
to the straight line right before the RIAA.
But whitch values to the other bunches ?
And how low should or can they go ?

Another issue that keeps me awake is how and with what material
the obvious shielding has to be done...
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