New Posts New Posts RSS Feed - 2:1 Step Up Device for low output cartridges.
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Welcome to the Graham Slee Audio Products Owners Club

 

Open to all owners plus those contemplating the purchase of a Graham Slee audio product wishing to use our loaner program: join here
Subscribe to our newsletter here (Rules on posting can be found here)


2:1 Step Up Device for low output cartridges.

 Post Reply Post Reply Page  <12
Author
Graham Slee View Drop Down
Admin Group
Admin Group
Avatar
Telling it as it is

Joined: 11 Jan 2008
Location: South Yorkshire
Status: Offline
Points: 8619
Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2017 at 10:04pm
At some point and on my list of things to do, I will be making a high output phono stage to suit those who insist on using insensitive valve amps. Such a device needs a very high supply voltage so that the signal doesn't clip. Actually it needs more than the usual 36 volts which opamps work on, and so requires the use of a ranging supply. I had thought of incorporating it into the "big Accession". I had also thought about giving each input (yes, this will have inputs for two cartridges) its own level control. Therefore it will do exactly what you're looking for. We will be happy to accept trade-ins Wink
Not simple enough for Google-Bot to understand...
Back to Top
Lucabeer View Drop Down
Senior Member
Senior Member


Joined: 24 Jan 2009
Location: Torino, Italy
Status: Offline
Points: 425
Post Options Post Options   Thanks (0) Thanks(0)   Quote Lucabeer Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2019 at 5:53pm
Graham, I had missed this discussion!

If you will ever make such a phono stage, let's call it a "Reflex M+":

- innovations introduced to of the Accession for the RIAA equalization kept separate from amplification (your patent, in short - no need for selectable equalization curve or "flat", though)
- selectable gain (let's say 40 dB, 44 dB, 48 dB for MM)
- mono switch
- selectable resistive and capacitive loading via easy front switches (no rear mini-switches)
- no volume pot (unless used to select the gain!)

... well, you already have a customer!

Back to Top
Smokeyjoec View Drop Down
New Member
New Member


Joined: 07 May 2019
Status: Offline
Points: 16
Post Options Post Options   Thanks (0) Thanks(0)   Quote Smokeyjoec Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2019 at 1:55am
What about an Accession (simplified) with variable output gain and switches for capacitance, mono and 2 outputs without the numerous RIAA curves.  I’m not sure how much that would simplify the circuit design and reduce the costs?


Back to Top
 Post Reply Post Reply Page  <12
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.094 seconds.