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Deluxe Reverb AB763 , nice rocker .this
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Hum Vibrato / Trem Deluxe reverb
Hi,
Is some one familiar with the hum for the Vibrato / Trem on F.ender Reverb PCB 4.0.
I have a hum when i switch the Trem on. Reverb is clean and quiet, amp is hum free and quiet.
It s a loud hum when i switch, with a 2 button switch the Vib on.
If this sounds familiar to you, please let me know. Suggestions, Tips let me know. Thnx in advance. Henri
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Looking for VOX AC30 bare chassis for FOX30 PCB.
Hi, my 1st post here. I'm in Canada and just ordered the FOX30 PCB, and I'm wondering where i can purchase a bare chassis for this build. I order a lot of stuff locally out of Toronto, and also the U.S., but I can't find a chassis this side of the Atlantic. Anyone have a lead on where I can purchase one from plz??
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lincoln96
24 janv.
welcome. Be careful when ordering a chassis from the US, our government is nailing us hard these days. Anything steel it seems.
Not on this side of the Atlantic, but have you heard of Modulus Amps? I've had good service from them on chassis and face plates. Shipping is not expensive and things come quickly.
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FOX 30
Has anyone had any luck ordering parts for this board using Beta version spread sheet.
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Ken Marlor
15 févr.
I'm having trouble sourcing JP1-JP4 on this spreadsheet. Also, they are not shown on the schematic or on the Layout. I have an mail in asking for clarification from Dr. Andrea and for any help he can give us.
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Hi I'm about to melt some solder on a DC 30 build and would like to hear from anyone who has built one. Any suggestions or advice about avoiding problems or getting great sound or any other aspect of building one of these will be most welcome, I have already read a suggestion to get the 10watt resistors off the main board to avoid cooking the board which sounds reasonable, Ill set these on tag boards. I'll be using all Hammond transformers 1750TB, 290MAX and 194E The other suggestion I have heard is to shield the OT to stop the ef86 oscillating, easy enough to do
Thank You in advance
Tim
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Sean
19 janv.
I’m still in the planning/ordering phase, so other than saying I’m interested in seeing how your build goes, I have a couple of thoughts I’d like to put out there for others considering this build:
Consider using stand-up style transformers. Given the large footprint of the PCB and the number and placement of the tube sockets, you may not be left with much room in many enclosures. I ended up buying Heyboer transformers, which are lay-flat, and from a rough sketch I can already tell things will be tight. That’s a bit of a regret, as I think I may have to elevate the board. Oh well.
Consider increasing the 100 ohm screen grid resistors to 1K, 2/3 W. Current-production EL84s aren’t the most robust tubes out there, and this adds a bit of extra protection at minimal (if any) cost.
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Trainwreck 25K Pot
I was wondering if there was a specific part number/manufacturer for the PCB mount 25K pot? I'm having problems finding one that matches the pin layout on the PCB.
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MESA MK2C review request
Hi guys, Andrea here!
I'm finally excited to share with you that the PCB for the Mesa MK2C is ALMOST completed. We're almost ready for a first production batch!
If someone has experience with this type of amp, I would love a second pair of eyes. Happy to offer a free board/discount for anyone willing to help ;) Let me know below the post
Cheers
Andrea Founder - AA Electronics
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Ben Ristic
03 janv.
Hi Andrea,
I've had success with a handwired Mark IV clone, and know the Mark topologies and schematics pretty well. I would love to evaluate a board for you guys :)
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SLO 100 Help
Hey everyone! Getting stuck on my SLO 100 build. Any help would be greatly appreciated, so thanks in advance!
I believe that the problem is between the Input Jack and the Return Jack, but I can't figure out where.
Symptoms: When instrument cable is plugged into the Input jack, no audio passes. There is a noise floor hum. All LEDs illuminate as intended. After a few moments, my current limiter gradually increases in brightness until it glows brightly (and remains bright). As the bulb reaches full brightness, the indicator LEDs for channel selection start to dim.
When I plug the instrument cable into the Return jack, the amp passes signal. The audio is full and works on both channels. Interestingly, the channel LEDs pulse in brightness slightly when audio signal is applied - there is a direct link with applied audio signal and the LED brightness.
I've pulled V1, V2,…
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Dumble 6V Aux Tap
Hey guys! New forum - I assume this is still the place to ask for tech advice!
I'm almost through the Dumble #102 build, and I'm using a Fender Twin power transformer that doesn't have the 6v Aux Tap for the relay circuit.
Would it be safe to pigtail/tap off the 6.3 heater voltage?
Thanks in advance!
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An update. The 60 cycle hum is gone. I changed some grounding s. Also the PT was responsible for hum. One bold from the 4 off the PT was a bit loose. Then the ground shutting motorboating hum in the Trem - circuit. Alle measures and routings were good. After resoldering some main point s in the Trem-circuit , tadaa. Solved. I think or the .001 cap had a cold solder , or 1 leg from the LDR , which goes to ground had a cold - solder . So such a nice beautiful amp for some good blues rock southern rock