Made a connection between the volume pot body and the ground of the 3.5mm jack. Seems to have fixed the problem of hum when touching the metal volume knob.
Hello friends, do most of you use preamp, potentiometer, or stepped attenuator for your TDA7297?
Generally, I use only the volume pot/control that is on the unit when you buy it. Despite the popular notion from the pervasive everything-must-be-modified-camp that these are trash, I've never found that to be the case. I've experienced no channel imbalance, no noise, nothing detrimental at all. In short "If it ain't broke, don't fix it."
Sometimes I use my 6N3 "Sain Smart" brand tube buffer and turn the volume pot on the amp all the way up. Thus, relying on that volume pot to control the source volume.
Those $12 or so SMD (surface mounted device) type volume pots on eBay are quite nice. I've made several passives with those.
If you need the ability to switch to different sources, I highly recommend these inexpensive switch boxes.
MW
Sometimes I use my 6N3 "Sain Smart" brand tube buffer and turn the volume pot on the amp all the way up. Thus, relying on that volume pot to control the source volume.
Those $12 or so SMD (surface mounted device) type volume pots on eBay are quite nice. I've made several passives with those.
If you need the ability to switch to different sources, I highly recommend these inexpensive switch boxes.
MW
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I had no idea a stepped attenuator could be so cheap! Destroyer, have you used one of these? I wonder if they are thick or thin film resistors...
There isn't anything that competes with them under $150. They make Alps blue sound like ****.
Wow. There are a ton of other stepped attenuators on eBay which spec thin film for slightly more money. You think they are all inferior?
3x the price of the one you linked, but well under $150! Might be good?
Stepped Attenuator 24 Position Stereo 10k | eBay
Stepped Attenuator 24 Position Stereo 10k | eBay
Good to know. What do you suppose is the blue body weakness? If the resistors are good, all that's left is the switch contacts, right?
Taobao has this - looks waaaaay too cheap though so I'm asking my gf to investigate to see if its legit. In the meantime, feast your eyes here : HI-END??????????.??DACT??ALPS.????15MM-???
Nice. But I will say I'll pay a few more $ to get the D shaft, so I can actually mount knobs that aren't ugly vintage ones 🙂 Maybe they have a D shaft?