What is paratactic?
What benefits?
How much are these?
Available in Hong Kong or Shenzen - in which shop?
Can you introduce yourself.
🙂
What benefits?
How much are these?
Available in Hong Kong or Shenzen - in which shop?
Can you introduce yourself.
🙂
See the circuit diagram
You can find, the signal only through a resistance, then it can infection the sound very little,
But in the R2R, the signal will through more resistance in most times, so the sound will be fall.
I'm a audio production made to order man . and all my production is my design.
You can find, the signal only through a resistance, then it can infection the sound very little,
But in the R2R, the signal will through more resistance in most times, so the sound will be fall.
I'm a audio production made to order man . and all my production is my design.
Thank you.
(I am going very soon to Hong Kong/ Beijing +)
How much – RMB or USD - is the remote control paratactic volume control?
(I am going very soon to Hong Kong/ Beijing +)
How much – RMB or USD - is the remote control paratactic volume control?
Hi
All the boards ,it have a remote device and a display board and a volume boad , total for 430RMB
All the boards ,it have a remote device and a display board and a volume boad , total for 430RMB
Is that price complete – with parts & built?
Maybe better to email me offline: rick57@optusnet.com.au
Thanks
Richard
Maybe better to email me offline: rick57@optusnet.com.au
Thanks
Richard
This is 12 position? My commercial experience is that many more positions are needed. My Eidetic GB1a preamp of 1989 used a 12 position resistive ladder and in the marketplace it pleased no-one despite all my tweaks for stepping. I updated to the commercially far more acceptable Alps 43 click pot with added shielding.
Amp Guru,
Where do you source these ALPS 43 position click pots?
Are they readily available?
Cheers,
Hugh
Where do you source these ALPS 43 position click pots?
Are they readily available?
Cheers,
Hugh
Hi Hugh,
From memory (1990), I managed to track down an alps agent in Australia. They had to be specified by a code that would do an eye chart justice - and I waited a few weeks for the production and delivery. They were 50K but had some crosstalk which improoved dramatically when I wrapped them in a (rubbing) copper box and earthed it. Using a 10K would lower crosstalk by 14 dB.
They may be more available from Taiwan, HK, or Singapore as an off the shelf these days.
Trust that helps. I could do with one.
From memory (1990), I managed to track down an alps agent in Australia. They had to be specified by a code that would do an eye chart justice - and I waited a few weeks for the production and delivery. They were 50K but had some crosstalk which improoved dramatically when I wrapped them in a (rubbing) copper box and earthed it. Using a 10K would lower crosstalk by 14 dB.
They may be more available from Taiwan, HK, or Singapore as an off the shelf these days.
Trust that helps. I could do with one.
Hi
The volume is use 12 switch to control 80 step and control -80DB to -3DB, it have a blue LED displayer , and it have four input select.
The volume is use 12 switch to control 80 step and control -80DB to -3DB, it have a blue LED displayer , and it have four input select.
Audio-gd,
80 position is good , for Rmb 430 - is that same as HK$6 =a$ ?
Is that with an IR remote controller board , don't think I'd want the visual display. What are the resistance range options?
80 position is good , for Rmb 430 - is that same as HK$6 =a$ ?
Is that with an IR remote controller board , don't think I'd want the visual display. What are the resistance range options?
430RMB =HK406
and 430RMB=$52
The resistance is use more DALE and two Holco, it have a IR remote controller board and have a remote controler and a volume control board.
and 430RMB=$52
The resistance is use more DALE and two Holco, it have a IR remote controller board and have a remote controler and a volume control board.
I dont want to rain on your parade but i would like to mention a few dissadvantages with your design. Depending on your volume setting your input impedance is different this means a different noise figure and a different bandwidth (which again means different noise figure).
Yes that's essentially what I was asking in my last post - resistance ranges for both in and out?
audio-gd?
audio-gd?
Yes adding a buffer before and after will minimize the effects of the changing load impedance but then you lose simplicity. Even the worst R2R attentuator will be alot better then 2 buffers.
Sorry but i just noticed your image. Iam not a big fan of having the volume control ONLY on the output (or in the middle). While having the volume control not on the input increases the noise performance it degrades the distortion. Your input stages are going to be swinging large voltages compared to a circuit with a volume control on the input. I guess its one trade off for another, designer's preference
The R2R still need a buffer after it , because R2R have 10K output impedance and will with the capacitance (of next stage ) be a high frequency RC filter.
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