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I've read about something called a PI trimmer inside of the amp. Does the OTS Mini have it?
- No, we omitted it from this design for simplicity.
Do I need to use matched power tubes?
- Although not necessary, matched power tube sets are recommended for best results.
Do I need to use a matched and balanced phase inverter?
- It is not necessary. Feel free to experiment with different tubes (of the same type) in your OTS, though!
I've read that the components used in this type of amplifier are really important. What is inside my OTS Mini?
- We use a combination of parts custom-made for us to our specifications (power transformer, output
transformer, choke, high-temperature / low-ESR electrolytic capacitors) and those used in the original
amplifiers (Vishay/Dale RN65 precision metal film resistors, 1W carbon film resistors, SBE 6PS polyester film
capacitors, high-quality ceramic disc capacitors, Belton tube sockets, and Alpha potentiometers). We prefer
high-quality enclosed Cliff (built in the UK) jacks to the open-style Switchcraft jacks used in the originals and
many clones. Finally, we occasionally use NOS components from our vast surplus parts collection in
locations they work well and complement the voicing or enhance the performance of the amplifier.
I like to use rack-mounted multieffects units. What is the output level straight from the EFFECTS LOOP SEND jack, -10dB or
+4dB?
- While not exact, -10dB is a better approximation than +4dB. The actual output level will depend on your
settings, particularly the volume controls. +4dB is usually reserved for recording/P.A. equipment with
balanced connections.
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