DHT Heater using VCCS - PCB or Kit (Possible Group buy)
#1171 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Yes, the buzz would most likely be the reg dropping out.
Analogue, the lost world that lies between 0 and 1.
#1172 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Yes, if you look at the output on a scope what you see in those conditions are fast low going spikes in the output. Its why checking with a meter doesn't give the full picture as the RMS value of the output will be about the same.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
#1173 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Unfortunately I don't have an o'scope but it was obvious when listening that something was awry.
I keep thinking about buying an oscilloscope but always seem to find something else to spend my money on!
I keep thinking about buying an oscilloscope but always seem to find something else to spend my money on!
Sorry, I couldn't resist!
#1174 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Received some additional PCBs from Andrew today. They'll probably go into a Bartola 3A5 preamp.... ...one day!
Sorry, I couldn't resist!
#1175 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
I built 8 in a marathon session at the weekend. I found the production line method to work better. Do the smd cassia on all boards, do the cc resistors, etc.
#1176 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
I adopted the same approach when I had eight to assemble for the 300B OTL project!
Sorry, I couldn't resist!
#1177 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Good news they made it ok
Analogue, the lost world that lies between 0 and 1.
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#1179 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Hello Andrew,
I would like to buy 2xsmall and 2xlarge boards. If you still have some available, could you send me a PM, please?
Thanks
Kai
I would like to buy 2xsmall and 2xlarge boards. If you still have some available, could you send me a PM, please?
Thanks
Kai
#1180 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
No problems, are you ok waiting for a week, or two, Kai? I'll put them by for you.malarkey1976 wrote: ↑Mon Sep 20, 2021 4:54 pm Hello Andrew,
I would like to buy 2xsmall and 2xlarge boards. If you still have some available, could you send me a PM, please?
Thanks
Kai
Send me a PM for details
Analogue, the lost world that lies between 0 and 1.
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#1181 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
It's no problem for me to wait. Please send me a PM when the boards are ready to ship or for further details. I'm new to this forum, so I'm not able to initiate a conversation via PM.
Thanks
Thanks
#1182 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Post a few more messages and you will be fine to PM
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
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#1184 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Hello Andrew,
I would like to buy 2xsmall boards or kits. I'm new to this forum, so I'm not able to initiate a conversation via PM.
I would like to buy 2xsmall boards or kits. I'm new to this forum, so I'm not able to initiate a conversation via PM.