It's been more than 2 years since last comment was posted but I just noticed the transistor should read DGS from top to bottom. At least that's what's shown on the data sheets.
Tried building this last night, with no success: tried BF244, 2n5458 (had to twist the legs), then tried them without twisting (from top to bottom DGS, per Fleon's comment) and no sound. Is the pinout correct in the layout?
if you check this : https://www.qsl.net/on7pc/datasheet/transistors/BF244A.pdf you'll see that the pinout is sgd so if the position is right on the layout it should be dgs
I also found this schematic online - https://imgur.com/a/juX39Qw
The Kit instructions also note that "To get more gain R8/C6 can be adjusted" - which would be awesome if we could ID those components to get some more drive from the circuit.
using the schematic i posted i see : r8 being the 1k resistor coming from pin6 from the ic going to the electolytic cap i12,c6 is the 22uf capacitor at k6
check your solders,bridges,,check the cuts (right place , right amount?)check your resistors and caps for the right values and use an audioprobe ? i say all this since it is verified by teddeeh almost 5 yrs ago. i have not build this one, i built the perf version but did not like the low output this circuit seems to have. i did like this one a lot https://dirtboxlayouts.blogspot.com/2024/03/hao-rustride-bass-driver.html
Hey hey, built but no sound :(
ReplyDeleteWithout power attsched signal passed through quietly so would that indicate power?
Power issue.^
DeleteSignal goes through in and out but when 9v & ground hooked up nuttin.
Ok, spotted a missing cut. Updated the layout. The cut is located left to drain of Q1. Power was fed through 5,6 resistor to pin 8. Hope it works now.
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ReplyDeleteVerified dude ;) many thanks
ReplyDeleteAwesime, I'll tag it!
DeleteBuild ist with 2n5458 and it works great but i don’t know the original so can not compare. Bought a BF244A but that was like 2€ and didn‘t work.
ReplyDeleteThis comment has been removed by the author.
DeleteThis comment has been removed by the author.
DeleteIt's been more than 2 years since last comment was posted but I just noticed the transistor should read DGS from top to bottom. At least that's what's shown on the data sheets.
ReplyDeleteTried building this last night, with no success: tried BF244, 2n5458 (had to twist the legs), then tried them without twisting (from top to bottom DGS, per Fleon's comment) and no sound. Is the pinout correct in the layout?
ReplyDeleteif you check this : https://www.qsl.net/on7pc/datasheet/transistors/BF244A.pdf you'll see that the pinout is sgd so if the position is right on the layout it should be dgs
ReplyDeleteThat's what I thought, but MountBashful''s comment about it not working with a BF244 gave me pause.
ReplyDeleteschematic https://imgur.com/f9zSTOh
ReplyDeleteI also found this schematic online - https://imgur.com/a/juX39Qw
ReplyDeleteThe Kit instructions also note that "To get more gain R8/C6 can be adjusted" - which would be awesome if we could ID those components to get some more drive from the circuit.
using the schematic i posted i see : r8 being the 1k resistor coming from pin6 from the ic going to the electolytic cap i12,c6 is the 22uf capacitor at k6
ReplyDeleteTried building this again last night: oriented the BF244A as DGS (top to bottom) and still no sound.
ReplyDeleteyou can also try a 2n5457 btw
Deletecheck your solders,bridges,,check the cuts (right place , right amount?)check your resistors and caps for the right values and use an audioprobe ? i say all this since it is verified by teddeeh almost 5 yrs ago. i have not build this one, i built the perf version but did not like the low output this circuit seems to have. i did like this one a lot https://dirtboxlayouts.blogspot.com/2024/03/hao-rustride-bass-driver.html
ReplyDelete