Hello,
some newbie questions on components on 100 Watt ods non hrm.
what is the difference between using a 250 K and a 100 K level pot. How does it affect the od sound ?
Also, what is the correct resistor to use in the entrance to v 1 a, some use 22 K and some use 33 K. Trying to improve the overdrive sound, all assistance appreciated.
riverman.
250K level pot.
Moderators: pompeiisneaks, Colossal
-
David Root
- Posts: 3540
- Joined: Fri Aug 04, 2006 3:00 pm
- Location: Chilliwack BC
Re: 250K level pot.
Lower pot resistance equals brighter tone. There are other effects too, lower pot throws away more gain, interstage impedances are different.
22K vs 33K on V1A grid is not a big deal. This resistor rolls off the high end beyond the audio range to help eliminate HF oscillations from parasitic effects of lead dress, RF/electrostatic interference (eg fluorescent lighting). HAD used both, lower resistance pushes the roll off point to a higher frequency.
As you increase the resistance of the grid resistor you get tonal modification, this starts around 100K (unless you're Dogears). Reduced high end and some compression and resistance to blocking distortion. That's why you see 100K and 180K in the OD stages.
22K vs 33K on V1A grid is not a big deal. This resistor rolls off the high end beyond the audio range to help eliminate HF oscillations from parasitic effects of lead dress, RF/electrostatic interference (eg fluorescent lighting). HAD used both, lower resistance pushes the roll off point to a higher frequency.
As you increase the resistance of the grid resistor you get tonal modification, this starts around 100K (unless you're Dogears). Reduced high end and some compression and resistance to blocking distortion. That's why you see 100K and 180K in the OD stages.
Re: 250K level pot.
Thanks for the reply. I appreciate it.
riverman.
riverman.