Hi,
yes that is an option. In fact I am pretty sure that I found a US firm that sells small PCBs for the pots and flat wire to a header that plugs into the pcb where the pot would have gone. That's is another (fall back) option. I prefer to keep the wiring to a minimum if possible.
what is the link for the pcb?
i am looking at
New Lite MV04 Remote Preamp Board Volume Control Input Selector | eBay
for volume control and input selector
Link
That looks nice.. it would be a good feature for this preamp. It should not be too hard to integrate.
Re. the links ... naturally I have lost the original, but I found the following:
The ε27 volume control potentiometer mounting board
ALPS potentiometer board
Neither of these are what I remember but thy give the general idea.
George
That looks nice.. it would be a good feature for this preamp. It should not be too hard to integrate.
Re. the links ... naturally I have lost the original, but I found the following:
The ε27 volume control potentiometer mounting board
ALPS potentiometer board
Neither of these are what I remember but thy give the general idea.
George
Here's another, similar option too. I bought a few of these to have around for current and future projects, and they seem to work as expected. You can use any of 3 popular pot sizes from Asia and found in many, many audio kits. Makes for easily moving pots off the PCB when you need to deal with mechanical limitations of an enclosure. Cheap too!
Rick
The remote control looks good, but it uses a 100K pot. The volume control in the preamp is a 5K linear pot. As far as I know, there are no motorised 5K pots. Can anyone advise about this or is remote volume control not going to be possible?
Multiple IO
I have been getting requests for an IO board with switched IO. How does this look? It's 5 (stereo pairs) x 1. Two inputs are balanced and 3 are RCA phono unbalanced. The smaller board is the front panel. The switch is a stock Lorlin. I could supply the PCB with the 2 required RCA blocks for $20 plus cost to ship. The balance of parts could be bought from Mouser. Anyone interested?
The new IO board is similar width of the main PCB. The front panel IO switch is shown here enlarged. It is designed to fit within a 1U chassis.
I have been getting requests for an IO board with switched IO. How does this look? It's 5 (stereo pairs) x 1. Two inputs are balanced and 3 are RCA phono unbalanced. The smaller board is the front panel. The switch is a stock Lorlin. I could supply the PCB with the 2 required RCA blocks for $20 plus cost to ship. The balance of parts could be bought from Mouser. Anyone interested?
The new IO board is similar width of the main PCB. The front panel IO switch is shown here enlarged. It is designed to fit within a 1U chassis.
Hi Guys,
I almost have my boards finished. Just waiting on some parts. I wanted to build a PSU while I was waiting. I drew a layout in Sprint by sort of following my ESP board but using most of the circuit from the Self PSU. It puts out +-16.66vac with a 100 ohm load to simulate 170mA load. Takes 17Vac input to get hold the 16.6v. Anything more doesn't change it. I'm attaching pics. Let me know what you think.
As you can see, I used 4 2200uF caps with a 10R resistor for a CRC front ala ESP. I didn't have any 3300uF cap on hand.
Blessings, Terry
I almost have my boards finished. Just waiting on some parts. I wanted to build a PSU while I was waiting. I drew a layout in Sprint by sort of following my ESP board but using most of the circuit from the Self PSU. It puts out +-16.66vac with a 100 ohm load to simulate 170mA load. Takes 17Vac input to get hold the 16.6v. Anything more doesn't change it. I'm attaching pics. Let me know what you think.
As you can see, I used 4 2200uF caps with a 10R resistor for a CRC front ala ESP. I didn't have any 3300uF cap on hand.
Blessings, Terry
Attachments
Nice work terry. Looking Good. You seem to be getting the hang of Sprint very fast.
i am awaiting on a cable & i'll be done as well.
Hi Rick,
Thanks, I'm having fun with it. The boards are 45 x 93mm. I put the 100n caps on the bottom with SMD's. I can provide PDF's for etching if anyone is interested.
Blessings, Terry
Hi,
I wanted to implement the volume control (not the selector) via remote control. However, as you may have noticed the volume pot is a 5K linear. The smallest motorised pot that is available from Alps (for example) is 10K. Of course the 10k pot could be used but with some db increase in noise and that would be a pity given the aim of building a very high quality device. So I had the idea that a quad pot of 10K could be used with the pairs connected in parallel. This gives a load of 5K as required and allows the automation that I required. Doug Self seems to think this idea is a goer so I freely share it and ask if anyone can see a problem, apart from cost, with this idea.
I wanted to implement the volume control (not the selector) via remote control. However, as you may have noticed the volume pot is a 5K linear. The smallest motorised pot that is available from Alps (for example) is 10K. Of course the 10k pot could be used but with some db increase in noise and that would be a pity given the aim of building a very high quality device. So I had the idea that a quad pot of 10K could be used with the pairs connected in parallel. This gives a load of 5K as required and allows the automation that I required. Doug Self seems to think this idea is a goer so I freely share it and ask if anyone can see a problem, apart from cost, with this idea.
I have been recently looking for a quad pot not motorized and failed to find any serious enough available in Europe.
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Quad Pot
ALPS Quad rotary Potentiometer RK27114MC motorized pot 10K or 50K logarithmic | eBay
Here is one that I found.. I guess you found it too? Assuming it is not a Chinese copy what are the quality issues that you find?
ALPS Quad rotary Potentiometer RK27114MC motorized pot 10K or 50K logarithmic | eBay