John Curl's Blowtorch preamplifier

[albin]

Originally posted by janneman


Yes. My favorite Sony TA-E88 has -10dB and -20dB switch in addition to the vol control. Often, I only use the switch and the vol control isn't touched for days.

Jan Didden

hello peoples
As a child i remember a valve radio,a three position volume switch,and another for loud or quiet
Jan
You posted a bit about the QTC pill doodads yesterday.
I used a pair of these as pressure variable resistors in series with the inputs to a power amp,Worked well I thought,for their crudity.
Their hysteresis would drive a control freak Mad though.
regards
Max
ps Perhaps using them under constant pressure as varied resistors,but then it"s back to switches.
pps apologies for refering to Qtc again,Thought everyone would know about them.

[pooge]

Originally posted by Steve Dunlap


That last one has already been answered by Peter Daniel.

Are you refering to the post where he said it was his favorite volume control?

[Edmond Stuart]

Originally posted by gk7
These look good I think:
http://www.acoustic-dimension.com/at...ators-main.htm
ladder type and 41 steps, but quite big.

Hi gk7,

Indeed, looks good, though I'm not sure if I can trust a company that also sells BS.

Regards,
Edmond.

[scott wurcer]

Originally posted by G.Kleinschmidt

claims of audible differences between ppb variations in resistor brands are about as credible as revelations regarding the second coming of Jesus.

Cheers,
Glen

I'm staying out of the resistor discussion. When a tech at Mass. General says upgrading a doppler ultrasound with naked Vishay resistors gets the surgeons to claim a "huge" improvement in circulatory diagnostics maybe I might listen.

[tvi]

Sony TA-E88 attenuator/balance

[tvi]

And the TA-E88 output level switch.


Regards
James

[Steve Dunlap]

Originally posted by pooge



Are you refering to the post where he said it was his favorite volume control?

I'm referring to the post were Peter Daniel said:



Yes, Placette is very well regarded and I've been using it for a while myself. However, after initial excitement, I was starting noticing defficiencies, mainly the coloration.


And:


But in the end, TVC is not perfect either. I have a chance listening without any attenuator now as the amp has just the right gain for normal levels and it's very revealing experience.

[john curl]

It is always surprising to me the subjective correlation of resistor sonic quality from people who have never even met each other. The general consensus is: Holco (old) soft., Holco (new) problematic, Resista (balanced, but imperfect), Vishay bulk metal standard, overly etched, but better, if ordered without case. Etc.
I have 100's of different resistors that look good and measure OK, BUT don't sound good. I do wish that I could find the reason, or at least be able to sell off my excess to the hear-no-difference group, so that they can use them with impunity. Scott, Cordell, let's make a deal!

[scott wurcer]

Originally posted by john curl
It is always surprising to me the subjective correlation of resistor sonic quality from people who have never even met each other. The general consensus is: Holco (old) soft., Holco (new) problematic, Resista (balanced, but imperfect), Vishay bulk metal standard, overly etched, but better, if ordered without case. Etc.
I have 100's of different resistors that look good and measure OK, BUT don't sound good. I do wish that I could find the reason, or at least be able to sell off my excess to the hear-no-difference group, so that they can use them with impunity. Scott, Cordell, let's make a deal!

Thank's for the offer but I'm moving all digital. Double precision floating point math has a -300dB noise floor.

[myhrrhleine]

i think we should consider the volume control stepsize.