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meanwhile out in the garage part II
- Thread starter kopcicle
- Start date
The screen print calls it a 300W amplifier? Clearly designed for linearity, not to impress a wattmeter worshipper.
73
73
Trip down memory lane, my first ever mobile CB radio was a TRC-9 3 channel crystal controlled.
A was ch 9 B was ch 11 and c was 20 the CB club channel.
Channel 9 was serious business and REACT had members monitoring 9 24/7.
That was awhile back...
What were we talking about ?
73
Jeff
A was ch 9 B was ch 11 and c was 20 the CB club channel.
Channel 9 was serious business and REACT had members monitoring 9 24/7.
That was awhile back...
What were we talking about ?
73
Jeff
I have not owned an end mill or lathe in over a decade since I lost my first home and had to down size.
I would like to own both again. What I never owned but would like to own is an old school well built metal shaper.
Luckily for me I have a brother in-law with a really nice home machine shop but it is not the same as having your own gear in your own garage, tool shed or basment!
I am getting tired of paying a gunsmith to do what I am able to do myself if I had the right gear! This is not the 1980's or 1990's you can run up a substantial bill in a hurry with the prices gunsmiths charge today! Finding good ones localy or even in your state that are not backed up like a little kid locked in a cheese factory. Do not get me started on getting dies made to match your reamer localy.
Shipping actions, die blanks, barrels with USPS, FEDEX, UPS is more nerve racking than trusting your son with Boy Scouts or Alter Boy services!! Star Trek level teleportation or industrial replicators can not become reality soon enough! Not holding my breath though! LOL
CNC would be nice but is over kill for what I need and what I would want to be forced to spend in maintenance.
Best of all the more you can do for yourself and the more skills you can master the less dependant on others you are. The confidence that comes from knowing you can do something yourself and having both the skills and the tools to do it always gives you options!
I would like to own both again. What I never owned but would like to own is an old school well built metal shaper.
Luckily for me I have a brother in-law with a really nice home machine shop but it is not the same as having your own gear in your own garage, tool shed or basment!
I am getting tired of paying a gunsmith to do what I am able to do myself if I had the right gear! This is not the 1980's or 1990's you can run up a substantial bill in a hurry with the prices gunsmiths charge today! Finding good ones localy or even in your state that are not backed up like a little kid locked in a cheese factory. Do not get me started on getting dies made to match your reamer localy.
Shipping actions, die blanks, barrels with USPS, FEDEX, UPS is more nerve racking than trusting your son with Boy Scouts or Alter Boy services!! Star Trek level teleportation or industrial replicators can not become reality soon enough! Not holding my breath though! LOL
CNC would be nice but is over kill for what I need and what I would want to be forced to spend in maintenance.
Best of all the more you can do for yourself and the more skills you can master the less dependant on others you are. The confidence that comes from knowing you can do something yourself and having both the skills and the tools to do it always gives you options!
The Visual Study of Vacuum Tubes - The Smalley Creative Blog
Understanding how to perform the visual study of vacuum tubes can enable you to readily identify the unique characteristics and applications of a given tube.
blog.smalleycreative.com
Okay, back to the high current ow voltage side of things.
W6PQL parts, more parts, and general QRO store
High voltage smells like chicken.
High current smells like barbecue.
Enough platitudes, and back to the meat of the post or as Frank Zappa once said "the crux of the biscuit is the apostrophe"
'
The whole enchilada
And an illustrated parts page to go with it
The control board
The schematic in pdf
High current DC switch
The other kind of relays
There's more, but if you can navigate your way here you can find the rest of the ubiquitous comestibles (combustibles?) on your own.
Previously discussed was a lightweight replacement for 500 HV @ 100ma.
Now I need to do a deep dive into a high current 50-60V supply.
The first option that comes to mind is the large variety of LARGE ie, commercial UPS's. Most are 48V with a bit of surface float charge.
Next would be China bay switchers.
Last would be a power conversion transformer* that you can stand on it's head to get 36V unregulated or 40-42V to put on top of a regulator. In any case these are in the binging extremely heavy, however you can weld with them. Do a bit of due diligence and read up on boost and buck transformers.** In other words if your output from the main transformer is close you can move it up or down a bit with a second transformer.
*usually something like 400 to 480v on one side and 200-220 on the other side. As a bonus some even include a 120V as well as low voltage, smaller current windings.
**this is where old high current filament transformers and battery chargers come in handy.
W8JI https://www.w8ji.com/choke_input_power_supply.htm
boost and buck transformer https://www.elliottelectric.com/Sta...ElectricalTables/buck_boost_transformers.aspx
W6PQL parts, more parts, and general QRO store
High voltage smells like chicken.
High current smells like barbecue.
Enough platitudes, and back to the meat of the post or as Frank Zappa once said "the crux of the biscuit is the apostrophe"
'
The whole enchilada
And an illustrated parts page to go with it
The control board
The schematic in pdf
High current DC switch
The other kind of relays
There's more, but if you can navigate your way here you can find the rest of the ubiquitous comestibles (combustibles?) on your own.
Previously discussed was a lightweight replacement for 500 HV @ 100ma.
Now I need to do a deep dive into a high current 50-60V supply.
The first option that comes to mind is the large variety of LARGE ie, commercial UPS's. Most are 48V with a bit of surface float charge.
Next would be China bay switchers.
Last would be a power conversion transformer* that you can stand on it's head to get 36V unregulated or 40-42V to put on top of a regulator. In any case these are in the binging extremely heavy, however you can weld with them. Do a bit of due diligence and read up on boost and buck transformers.** In other words if your output from the main transformer is close you can move it up or down a bit with a second transformer.
*usually something like 400 to 480v on one side and 200-220 on the other side. As a bonus some even include a 120V as well as low voltage, smaller current windings.
**this is where old high current filament transformers and battery chargers come in handy.
W8JI https://www.w8ji.com/choke_input_power_supply.htm
boost and buck transformer https://www.elliottelectric.com/Sta...ElectricalTables/buck_boost_transformers.aspx
Always took a simpler approach to this. The low-voltage winding on a buck transformer normally goes in series with the primary side of a bigger transformer, to increase or reduce the voltage reaching its primary winding. Used this trick to turn down a few "competition" transistor base amplifiers from 20-plus volts down to 15 or 16.
Whatever the big transformer's primary-winding current will be is what the buck transformer's secondary current rating needs to be.
They're in series, so the current ratings should agree. I suppose the buck transformer's secondary current rating can be higher than the one you're 'bucking'. Just don't want it to be lower.
73
Whatever the big transformer's primary-winding current will be is what the buck transformer's secondary current rating needs to be.
They're in series, so the current ratings should agree. I suppose the buck transformer's secondary current rating can be higher than the one you're 'bucking'. Just don't want it to be lower.
73
- No one is chatting at the moment.