I can probably find a decent one to use,buuut number 1 is how do I even mount the thing.lol
A capacitor clamp?
https://www.digikey.ca/en/products/...=N4IgTCBcDaIMYEMAOC4EsAuB7ATgAjgBsEBbJEAXQF8g
A lot cheaper here (oddly): https://www.partsconnexion.com/capacitors-clamps.html
jeff
https://www.digikey.ca/en/products/...=N4IgTCBcDaIMYEMAOC4EsAuB7ATgAjgBsEBbJEAXQF8g
A lot cheaper here (oddly): https://www.partsconnexion.com/capacitors-clamps.html
jeff
If this is one of our your first from scratch build, I would suggest avoiding components like motor run caps. Use cheaper, readily available, compact electrolytic and, when reasonable, film. Get the fundamentals of circuit layout and component scaffolding, then revamp later. You'll learn and make mistakes and eventually you'll know what you want to go the extra mile for. Those motor run caps will introduce mounting and layout complication that, in my opinion, will offer marginal benefit while costing more and potentially fostering an unhealthy obsession with capacitors.
Where are you? Might be able to help out with a few bits for the price of postage. You've got most of the expensive bits, I've noticed 4mm speaker chassis terminals and RCA IP's have gone up a lot, same as everything really. Here in the UK that's compounded by leaving the EU : did no one who voted to leave think how it would affect impoverished valve amp builders? It's the usual nonsense wave a flag and sane folk go mad.
Anyhoo, can help with the pots, some resistors & caps and a load of hookup wire in various colours, drop us a PM if interested, Andy.
Anyhoo, can help with the pots, some resistors & caps and a load of hookup wire in various colours, drop us a PM if interested, Andy.
My imagination doesn't quite match my skills yet. Lol I've been exploring my options for electrolytic capacitors. Finding a radial cap with good ESR, high voltage and long life is what I'm going for.
The more I explore my options for building this thing the more I realize how lucky I got when I built my fist amp. It was built to the specifications in the circuit diagram using the guts from a portable RCA record player. It was a point to point nightmare with a hv center tap tied to the chassis with no ground power cord. I used a 47uf cap -resistor in place of the Hammond inductor, 47uf filter cap followed by another resistor then the final 20uf gigantic film cap. The 5y3-rectifier (I'm learning) is only rated for 30ish uf.
I have no clue what voltages I was running nor did I understand about how the humming would only stop once the music was playing. It sounded like gold to my ears and that got me hooked.
My only regret is I think my original RCA output tubes took a beating. They have white flakes...isn't that loss of vacuum?
I have no clue what voltages I was running nor did I understand about how the humming would only stop once the music was playing. It sounded like gold to my ears and that got me hooked.
My only regret is I think my original RCA output tubes took a beating. They have white flakes...isn't that loss of vacuum?
Attachments
The ground was a star tied to chassis for the filter capacitors and trafo center tap followed by a ground bus. Further reading has somewhat....clued me in about better grounding, but im leaning towards something simplier for the 2nd try 
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No, that's more likely pieces of mica. The inside of the tube is usually milky white when there is a loss of vacuum.
jeff
What is he using as a backer board underneath the components? Looks phenolic and possibly DIY friendly, assuming I can find the appropriate parts (the hard part)
https://robrobinette.com/Tube_Amp_Safety.htm
https://robrobinette.com/Tube_Amp_Safety.htm
Some good reading on grounding currents. Ill add to this list as I go. Hopefully it will help someone else out in return.
https://el34world.com/Forum/index.php?topic=27188.0
https://el34world.com/Forum/index.php?topic=27188.0
Some good reading as I'm going along. Ill add to this list as I go. Hopefully it will help someone else out in return. Admittedly a lot are about guitar amplifers, but I'm thinking many parallels apply.
Currents that flow in ground paths
https://el34world.com/Forum/index.php?topic=27188.0
https://el34world.com/Forum/index.php?topic=18164.0
http://www.valvewizard.co.uk/Grounding.html -good pictures /ideas for perfboard style layout
https://el34world.com/Forum/index.php?topic=19242.0
I want to do my heater wires like this. Elevated and away from everything else in order take advantage of the 3 inch enclosure height.
https://www.tdpri.com/threads/filter-cap-grounding.442086/ post 15 is the direction I'm leaning towards
How to read tube schematics
https://robrobinette.com/Reading_Tube_Amp_Schematics.htm
Tube amp safety
http://tubelab.com/safety/amplifier-grounding/ output transformer ground /safety /many other things
Important reading.
https://robrobinette.com/Tube_Amp_Safety.htm
Free DIY software (only pc) that helps you design a layout In a grid style fashion.
http://diy-fever.com/software/diylc/
Currents that flow in ground paths
https://el34world.com/Forum/index.php?topic=27188.0
https://el34world.com/Forum/index.php?topic=18164.0
http://www.valvewizard.co.uk/Grounding.html -good pictures /ideas for perfboard style layout
https://el34world.com/Forum/index.php?topic=19242.0
I want to do my heater wires like this. Elevated and away from everything else in order take advantage of the 3 inch enclosure height. https://www.tdpri.com/threads/filter-cap-grounding.442086/ post 15 is the direction I'm leaning towards
How to read tube schematics
https://robrobinette.com/Reading_Tube_Amp_Schematics.htm
Tube amp safety
http://tubelab.com/safety/amplifier-grounding/ output transformer ground /safety /many other things
Important reading.
https://robrobinette.com/Tube_Amp_Safety.htm
Free DIY software (only pc) that helps you design a layout In a grid style fashion.
http://diy-fever.com/software/diylc/
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Turret board information
http://www.frontiernet.net/~jff/TrainwreckExpressCombo/Trainwreck Express 6V6 in combo amp.html although I'm leaning towards my previous post #15
https://el34world.com/Hoffman/instructions.htm more detailed turret board info
http://www.frontiernet.net/~jff/TrainwreckExpressCombo/Trainwreck Express 6V6 in combo amp.html although I'm leaning towards my previous post #15
https://el34world.com/Hoffman/instructions.htm more detailed turret board info
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Parts and good radial capacitor source
https://hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=Capacitors&ORDER_ID=115116427
https://hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=Capacitors&ORDER_ID=115116427
What's a good source for that old school, stranded,pre tinned wire that was used in some vintage amps? It has a harder outer jacket then I'm used too. I'd like to use it in my build.
Depends where you are located, but there is a thread here from the UK Vintage Radio chapter ...
Hook up wire suggestions
The good stuff that looks good when it is soldered (no burning or shrinkback of insulation) is not cheap.
Hook up wire suggestions
The good stuff that looks good when it is soldered (no burning or shrinkback of insulation) is not cheap.
Looking for a good source for grommets to pass wires between the enclosure. What size is preferred?
Thanks again
Thanks again
You lose a couple of mm in the hole. I suppose I must have a selection of 6mm, 8mm and 10mm. Big ones can be cut down if you are short of the right size, as long as it is tight in the whole. The hardware section in my local DIY superstore had a good selection, along with all the nuts and bolts and serrated locking washers, locking nuts, etc.
The amp im designing has a speaker to headphone dpdt switch for headphone jack to speaker output. Id like to find a nice label to affix to the enclosure. The ultimate solution would be a metal tag(on off) that sits on the switch sandwiched between the nuts, but im willing to accept stickers lol.
I'd like to put my power filter section on top of the enclosure using a nice eyelet board suspended by some standoffs. Problem is I need to cover it with a clear acrylic cover. Anyone know where I can get something like that?
