I am desperately trying to finish off my amp for the event. I am rewiring it, and hope that I don't insert a bad noise. I think it should be fine. Last I measured, it was very quiet -- at least in the 60/120 Hz department.
Let's hope I don't mess it up.
Bloody thing weighs a ton. It's an F5T with a monster transformer, about 95 watts RMS per channel into 8 ohms......all in a single enclosure. Made with IRF 240 and 9240 outputs.
I might not be able to get the snubbers back on before the event. If I do, it'll be temporary. Hoping that I've made it a bit more sensible...at least maintenance wise.... at the expense of a lot of contacts.
Let's hope I don't mess it up.
Bloody thing weighs a ton. It's an F5T with a monster transformer, about 95 watts RMS per channel into 8 ohms......all in a single enclosure. Made with IRF 240 and 9240 outputs.
I might not be able to get the snubbers back on before the event. If I do, it'll be temporary. Hoping that I've made it a bit more sensible...at least maintenance wise.... at the expense of a lot of contacts.
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Yes 2 pole Speakon at the speaker end.
The shop speakers are 40 year old JBL home built 4 way - 100db/1 watt - loosely based on the 4350 studio monitor with larger woofers and mid horn
the other end is bare wire, spades, and bananas all on plug in adapters so it will plug into most amps brought in quickly
Re F5 T we have a special hand fork that raises to about 30 inches, load it onto that from the trunk and it wheels right in to the listening room and connect it without having it to be unloaded from the hand fork
The shop speakers are 40 year old JBL home built 4 way - 100db/1 watt - loosely based on the 4350 studio monitor with larger woofers and mid horn
the other end is bare wire, spades, and bananas all on plug in adapters so it will plug into most amps brought in quickly
Re F5 T we have a special hand fork that raises to about 30 inches, load it onto that from the trunk and it wheels right in to the listening room and connect it without having it to be unloaded from the hand fork
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Rick,
The amp is at home and I have too much to move for food and other electronics for the meet to bring. I can send some pics. Amp chassis has standoffs added to mount the new driver boards, power supply rebuild finished, just need to match the jfets and mount the boards, output zobel is mounted on the original Perreaux board (its higher power handling).
Then test it with 1 and then 3 output pairs.
Did you change gate resistors or use the 221/475 as the Profusions double die devices are double the capactance of the DH 200 Hitachis.
The amp is at home and I have too much to move for food and other electronics for the meet to bring. I can send some pics. Amp chassis has standoffs added to mount the new driver boards, power supply rebuild finished, just need to match the jfets and mount the boards, output zobel is mounted on the original Perreaux board (its higher power handling).
Then test it with 1 and then 3 output pairs.
Did you change gate resistors or use the 221/475 as the Profusions double die devices are double the capactance of the DH 200 Hitachis.
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That's fine Dave, it must be a slug to move, bring your pics along and we can discuss your build.
Not sure if you read, when I did asked Bob C. to comment about the requirement for matching complementary jfets for Idss in this design case.
Hafler DH-200/220 Mods
Not sure if you read, when I did asked Bob C. to comment about the requirement for matching complementary jfets for Idss in this design case.
Hafler DH-200/220 Mods
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Joined 2009
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I spoke too soon!! I think I still have a lightly used Yamaha Dolby deck somewhere in my basement
Hey, I recently bought a Nakamichi CR-5! I have a BX-300 and a BX-150, a Yamaha deck and a Teac V-800x. I couldn't resist the CR-5 as I had always wanted that or a CR-7. Really nice machine.
If you had Nakamichi deck, you might still use it. I also have a Nakamichi TD-700 car cassette deck. It sounds awesome. Tapes don't skip on bumps.
-Chris
If you had Nakamichi deck, you might still use it. I also have a Nakamichi TD-700 car cassette deck. It sounds awesome. Tapes don't skip on bumps.
-Chris
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Joined 2009
Paid Member
Or the location in some Internet-safe way such as "look for Agincourt Mazda" and the unit number is (also coded somehow)
B.