Various Populated Booster Boards - SHO, RM, SRPP
Posted: 08 Apr 2010, 03:55
Hi everyone, I have a few boards here that I built up for a project that got sidetracked and now they're taking up space...
The boards are fully populated, except for the Rangemaster which doesn't have a transistor or emitter resistor - you need to choose and emitter resistor value that will correctly bias whatever transistor you put in it, or you could just tack a trimmer there and adjust it as needed.
All three boards have various extra connections for some different things. The Rangemaster is set up to have a switch for selectable Treble/Full Range boost and a switch for high/low gain. The SRPP boost features 2SK117 JFETs and is set up for a switch to select high/low gain, but you could probably put a pot there for variable gain control as well. The SHO is the standard crackling kind and features a good quality Zetex BS170, and is set up to allow switching between either 10M or 1M biasing resistors for the different responses you'll get.
I used good quality parts on all of these and they include some nice stuff like mil-spec RN55 metal film resistors and Sprague 150D high quality tantalum caps.
Prices are as follows:
SHO = $15
SRPP = $20
Rangemaster = $20, and I'll include a Russian germanium transistor that should work well in it.
Or, buy all 3 together for $40.
A basic hookup diagram will be included with each board. Includes only the boards, not full kits. Price includes shipping. I can accept payment via PayPal. Email me, martin[at]soulsonicfx.com if you are interested.
The boards are fully populated, except for the Rangemaster which doesn't have a transistor or emitter resistor - you need to choose and emitter resistor value that will correctly bias whatever transistor you put in it, or you could just tack a trimmer there and adjust it as needed.
All three boards have various extra connections for some different things. The Rangemaster is set up to have a switch for selectable Treble/Full Range boost and a switch for high/low gain. The SRPP boost features 2SK117 JFETs and is set up for a switch to select high/low gain, but you could probably put a pot there for variable gain control as well. The SHO is the standard crackling kind and features a good quality Zetex BS170, and is set up to allow switching between either 10M or 1M biasing resistors for the different responses you'll get.
I used good quality parts on all of these and they include some nice stuff like mil-spec RN55 metal film resistors and Sprague 150D high quality tantalum caps.
SHO = $15
SRPP = $20
Rangemaster = $20, and I'll include a Russian germanium transistor that should work well in it.
Or, buy all 3 together for $40.
A basic hookup diagram will be included with each board. Includes only the boards, not full kits. Price includes shipping. I can accept payment via PayPal. Email me, martin[at]soulsonicfx.com if you are interested.