The JJ 5751 is a lower gain pre-amp valve that that can be used as a drop in replacement for an ECC83 (12AX7). It has between 20-30% less gain than the standard JJ ECC83s. It follows the usual compact JJ plate design and is well balanced and harmonically rich. They are ideal if you want to reduce (tame) the gain stage on your amp.
These are premium and tested on specialised digital and analogue testing equipment by Karltone as follows
- Gain (A)
- Transconductance (gm)
- Noise (dbv)
- Emission Quality
- Grid Leakage
Test results are provided with purchase