Because of my increasing email about Lowthers let me offer this gizmological
metacontext to enjoy their eccentric flavor to the max....this is all about
tuning for maximum tonal whole-osity and minimizing their nascent tonal discordance.
Here are some simple consideration:
- Do not use electrolytic capacitors in your power supplies only use oil caps
which can be obtain from Angela Instruments or Ron Welborne. Check the Jensen
capacitor web site. Dont worry about not having enough capacitance because
you can always, like I do, build and outboard capacitor bank. Electrolytics
are not cool in the upper frequencies.
- Use oil coupling caps because plastic capacitors of all genres sound
like plastic capacitors, which are better than electrolytics...and there are
many different sounding oil caps.
- Use chokes on power supplies and create a separate choke filtration
system for the input circuits...chokes "smooth" the sound out.
- Use tube rectifiers, and be sure to experiment with different brands.
Solid State rectifiers are not a good idea with Lowthers because of the high
frequency hash and less than optimal tone.
- Your input tube controls your tonal destiny...experiment with different
- Do not use metal film or metal oxide resistors anywhere in the circuit...only
use carbon film resistors which have a smoother sounds...and they are cheap.
If you can find high wattage carbon film resistors make up one that is equal
to a very big 10 watt jobby for your output tube bias...if you need it.....and
be sure to experiment with different resistors on your output tube filament
- Bypass your bias cap on your input circuit with an oil film cap.
Do the same with your bias cap on your output tube.