#1
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Amp build thread #2: Super Reverb
Just got the first two boxes of parts for my next build: blackface Super Reverb, circuit AB763. I need to open them up and check the inventory against the packing list, but first I have a dentist appointment.
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"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |
#2
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Looking forward to this, Clint. You got it from the same retailer as last build?
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#3
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Yup. Inventory looks good so far, only missing the power transformer and cabinet which should be here next week. This is definitely a complex beast compared to a tweed. I'll be taking my time with this one for sure. Looks like I should order a bias probe for my multimeter tonight for when I power it up later.
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"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |
#4
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Quote:
Details: Tie pins 1+8 together, connect 1 ohm resistor between 1+8 and ground. Run wire from each 1+8 to red panel jack; run wire from ground to black panel jack. Iterate for each output tube or tube pair. Set DVM to voltage and insert probes to monitor voltage drop across reference resistor. V=RI >> mA across resistor translates directly to mV. Iterate for each tube to read bias current.
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Go for the Tone, George Last edited by Tone Gopher; 01-08-2015 at 05:18 PM. |
#5
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Thanks for the tip. I had seen a few people do that mod, but I plan on building a few more amps and a bias probe will come in handy later. My band's rhythm guitarist's amp is starting to need a retube too, and it'll come in handy for that as well.
Got a little bored last night and this morning, so I built up the chassis as far as I could. Installed jacks, pots, sockets, OT, filter choke, and the reverb driver. The OT is larger than the power transformer in my tweed. What a hunk of iron! I had to modify my chassis cradle to fit this thing too. It wouldn't spread far enough apart stock. First round of pics:
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"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |
#6
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Exciting I love the smell of roisin in the morning.
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#7
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It smells like vintage tone!
Working through the main eyelet board now, about 1.5 hours in and a quarter done. I envy the people that can build these in the supposed "time to complete" listed, but I'm having fun.
__________________
"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |
#8
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Six hours spent building up the main board and filter cap board. Time to put it aside until tomorrow and give my hands and eyes a break. Tomorrow I'll go over it again making sure I didn't miss any connections, the solder joints look good, and then clip all the extra component leads.
__________________
"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |
#9
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The board looks like it checks out against the layout diagram and the schematic, and some pics of an original 60's Fender I found online. Whew!
I ran about 3/4 of the heater wiring today, and the Fedex guy dropped off my cabinet and power transformer today. That was quick - wasn't supposed to be here until Tuesday. I ordered some more wire today too; I may have cut the leads from the board a little long and used it up faster than anticipated. Still got a foot left, but I like having plenty on hand for "oopsies". Later tonight, I'll install the speakers and reverb tank in the cabinet. Time to set this aside until my next weekend after that's done.
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"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |
#10
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Looks good, Clint. Give your eyes a break. Do you wear goggles when you solder?
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#11
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Don't know what kind of tubes you're using, but I wouldn't put anything but the best in that puppy:
http://www.thetubestore.com/Tubes/JA...JAN-GE-12AX7WA http://www.thetubestore.com/Tubes/JA...hilips-12AT7WC http://www.thetubestore.com/Tubes/JA...by-JAN-Philips http://www.thetubestore.com/Tubes/5A...nalex-GZ34-U77 |
#12
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Thanks. Not yet, but I might need to in a couple of more years. My near vision is not quite what it used to be, but I'm not ready to admit it yet.
The internet is an amazing resource for these projects. I've found great pics of these old amps, and other build threads that really shed light on the easy way to do things. Saves a lot of "oh, I shouldn't have done that".
__________________
"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |
#13
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Quote:
__________________
"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |
#14
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That's cool dude keep posting pics. I've eyeballed these kit builds before is that what you are doing? Do you sell these amps?
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#15
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No, I don't build these to sell. It's a fun hobby for me though. I fit in build time around my work schedule, so it takes me a little while to get through one. I'll be picking it back up this weekend, and posting more pics as I work.
__________________
"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird |