<b>Preamp Tubes [Note orders are picked and shipped on weekends. Please take this into consideration when placing your order.]</b>

Dual Triode Grading System: All RAM Tube Works dual triodes are tested and graded using our proprietary tube testing computer developed by Roger A. Modjeski. The following grades are available in all dual triode types. Super Low Noise (SLN): Quite simply the industry’s quietest tube, suitable for the finest phono stages as well as any other critical application. Our SLN tubes are within 1dB of the theoretical noise limit for that tube. Low Noise (LN): A superior tube especially tested for today’s quality line stages. Our LN tubes are within 4dB of the theoretical noise limit for that tube. Standard Grade (SG): Our most economical tube, yet still a product of selection. In fact, it easily outperforms the best tubes offered by other companies.

Preamplifier Tube Data: The side panel of each tube box contains the values for the following parameters for section one and section two:

VN Noise voltage ouput in micro-volts over a bandwidth of 400 - 20K Hz. RAM Our proprietary factor for the perceived sonic noisiness and variation. MIC Microphonics, susceptability to airborne and chassis vibration. GAIN AC voltage gain at 1K Hz. PVT DC value at plate to show operation variations.


7199 for Dynaco
6DJ8 - Low Noise NOS Pre-war Yugo or NOS Virgin-Commie
6DJ8 - Super Low Noise NOS Pre-war Yugo or NOS Virgin-Commie
7199 for Dynaco

$60.00
6DJ8 - Low Noise NOS Pre-war Yugo or NOS Virgin-Commie

$55.00
6DJ8 - Super Low Noise NOS Pre-war Yugo or NOS Virgin-Commie

$75.00
12AX7 - Standard Grade
12AX7 - Low Noise
12AX7 - Super Low Noise
12AX7 - Standard Grade

$30.00
12AX7 - Low Noise

$45.00
12AX7 - Super Low Noise

$95.00
12AT7 - Standard Grade

$30.00
12AT7 - Low Noise

$45.00
12AT7 - Super Low Noise

$95.00
12AU7 - Standard Grade
12AU7 - Low Noise
12AU7 - Super Low Noise
12AU7 - Standard Grade

$30.00
12AU7 - Low Noise

$45.00
12AU7 - Super Low Noise

$95.00
12AY7/6072A - Standard Grade
12AY7/6072A - Low Noise
12AY7/6072A - Super Low Noise
12AY7/6072A - Standard Grade

$35.00
12AY7/6072A - Low Noise

$50.00
12AY7/6072A - Super Low Noise

$95.00
5751 - Standard Grade for Conrad-Johnson
5751 - Low Noise for Conrad-Johnson
5751 - Super Low Noise for Conrad-Johnson
5751 - Standard Grade for Conrad-Johnson

$30.00
5751 - Low Noise for Conrad-Johnson

$45.00
5751 - Super Low Noise for Conrad-Johnson

$90.00
5965 - Standard Grade

$20.00
5965 - Low Noise

$30.00
5965 - Super Low Noise

$60.00
12AU7 - For CAT Preamp Line Input
6922 - Standard Grade
6922 - Low Noise
12AU7 - For CAT Preamp Line Input

$95.00
6922 - Standard Grade

$35.00
6922 - Low Noise

$70.00
6922 - Super Low Noise
Tungsram 12AX7 - Standard Grade
Tungsram 12AX7 - Low Noise
6922 - Super Low Noise

$90.00
Tungsram 12AX7 - Standard Grade

$65.00
Tungsram 12AX7 - Low Noise

$90.00
12AX7 Tungsram - Super Low Noise
12AX7 Tungsram - Super Low Noise

$125.00
12AX7-Standard Grade YUGO

$40.00
12AX7-Low Noise YUGO

$55.00
Amperex 7308 Gold Pin - Standard Grade
Amperex 7308 Gold Pin - Low Noise
12AX7-Super Low Noise YUGO

$105.00
Amperex 7308 Gold Pin - Standard Grade

$75.00
Amperex 7308 Gold Pin - Low Noise

$95.00

Need assistance? Email tubeaudiostore@gmail.com or call 805-687-2236. Photography by VisionQuest Photography