Special Pages

Small Stone Phaser

Vintage Phaser pedal

Other names for this product: Smallstone, EH4000,

Courtesy/Thanks to:

Description: The Smallstone is somewhat unique in using Operational Transconductance Amplifiers (OTA's) for phase shift stages instead of opamps with variable resistors. All of the IC's are house marked EH1048, but can be replaced with CA3094 which is a combination of an OTA equal to the CA3080 and a darlington emitter follower. Later Small Stones used slightly different circuits, but all used the OTA.

Comments

You need to be logged in to add a comment.

Editing and adding

You need to be logged in to edit and add files and urls etc.

Categories & Tags

Popular tags for this:

Effect

Phaser

You must be logged in to add tags.

Inventory & Trading

You need to be logged in to administer your inventory

No one is selling this product at this time.

Files

000018.jpg
	Schematics for the EH Small Stone
smallstonevisual.ps
	Schematics for the Smallstone Visual Phaser in PS format
smallstonephaser_issuej_schematics.
	The Schematics for the SmallStone. The schematics is converted from the PS file.
smallstone_pedal.jpg
	Picture of the Small Stone Phaser pedal

Manufacturers

Electro-Harmonix
	from their site: EH is back, once again putting innovative stompboxes at the feet of musicians th

Other versions/mods

Smallstone Visual Phaser
	A home build Elektro Harmonics SmallStone Phaser

Parts used

2n5087

2N5088
	NPN Silicon Amplifier Transistor
EH1048
	PROBALBY the same as a CA3094
CA3094
	30MHz, High Output Current Operational Transconductance Amplifier (OTA)