Search found 68 matches
- Tue Mar 14, 2023 6:59 am
- Forum: Technical Discussion
- Topic: Rocket build
- Replies: 37
- Views: 4246
Re: Rocket build
try a 6v6 qaud.
- Wed Mar 08, 2023 3:19 pm
- Forum: Trainwreck Discussion
- Topic: Choke versus resistor for power filtering
- Replies: 5
- Views: 1484
Re: Choke versus resistor for power filtering
just the choke, again look at the rocket schem. I cant remember but ken used the 1k for a reason. Try it and report your findings.
- Wed Mar 08, 2023 6:38 am
- Forum: Trainwreck Discussion
- Topic: Choke versus resistor for power filtering
- Replies: 5
- Views: 1484
Re: Choke versus resistor for power filtering
"better" is subjective. look at the rocket PS, a choke replaces
1k-25w R between the CT and screens. Try it, maybe marshall like.
1k-25w R between the CT and screens. Try it, maybe marshall like.
- Tue May 05, 2020 3:30 am
- Forum: Technical Discussion
- Topic: Discharging filter caps
- Replies: 8
- Views: 1020
Re: Discharging filter caps
that is true! if it is an unknown circuit a 10k or what have you jumper is not a bad thing to have. I agree a bleeder should be a standard issue.
- Sat May 02, 2020 8:42 pm
- Forum: Technical Discussion
- Topic: Discharging filter caps
- Replies: 8
- Views: 1020
Re: Discharging filter caps
make up a jumper with 10k 1-2w resister in serious insulated/heat shrunk with insulated alligator clips. less spark than just a wire.
- Sat May 02, 2020 8:34 pm
- Forum: Technical Discussion
- Topic: Discharging filter caps
- Replies: 8
- Views: 1020
Re: Discharging filter caps
I believe the term is called "dielectric absorption". I'm pretty sure millivolts won't shock you. I've seen the high voltage oil-run caps with a resistor strapped across the terminals when stored to prevent this.
You can touch the ends of a 9v battery fine..
You can touch the ends of a 9v battery fine..
- Sat Apr 11, 2020 2:58 am
- Forum: Technical Discussion
- Topic: 2020 Monkeymatic Black Butte Desktop #2
- Replies: 34
- Views: 3315
Re: 2020 Monkeymatic Black Butte Desktop #2
looks great! is this a new concept you've arrived at?
- Sat Apr 04, 2020 6:23 pm
- Forum: Technical Discussion
- Topic: standby switch position
- Replies: 12
- Views: 849
Re: standby switch position
"Follow valvewizard’s recommendation".
That's the plan. just need to modify my board with an extra eyelet. piece of cake!
thanks again pdf
That's the plan. just need to modify my board with an extra eyelet. piece of cake!
thanks again pdf
- Fri Apr 03, 2020 8:51 pm
- Forum: Trainwreck Discussion
- Topic: First Rocket build
- Replies: 30
- Views: 5248
Re: First Rocket build
Nice! that looks cool. is this intended for a combo?
tubes coming out the back.
tubes coming out the back.
- Fri Apr 03, 2020 8:32 pm
- Forum: Technical Discussion
- Topic: standby switch position
- Replies: 12
- Views: 849
Re: standby switch position
gotcha- the 5v would be on before the HT-winding.
I left some extra length on my tranny wires,, a good thing.
I'll move it between plate cap and screen.
thanks again pdf
I left some extra length on my tranny wires,, a good thing.
I'll move it between plate cap and screen.
thanks again pdf
- Fri Apr 03, 2020 6:07 pm
- Forum: Technical Discussion
- Topic: standby switch position
- Replies: 12
- Views: 849
Re: standby switch position
Thanks for your input PDF. From the Valve Wizard site its not recommended to "hot switch" the tube rectifier (still working out values for current limiting resistors). I have the center position of my switch -ac for heaters and lifted ct. top position engages ct. I assume this is not "hot switching"...
- Wed Apr 01, 2020 11:57 pm
- Forum: Technical Discussion
- Topic: standby switch position
- Replies: 12
- Views: 849
Re: standby switch position
I should have mentioned its a cathode bias output.
My PT is 700 ct so a tube rectifier is in order, would that be problematic?
the thing is it's the only switch I have.
plus when you elevate the filaments 6.3 is that a fix bias thing or can it be done with cath. bias output above the cath. voltage?
My PT is 700 ct so a tube rectifier is in order, would that be problematic?
the thing is it's the only switch I have.
plus when you elevate the filaments 6.3 is that a fix bias thing or can it be done with cath. bias output above the cath. voltage?
- Wed Apr 01, 2020 9:46 pm
- Forum: Technical Discussion
- Topic: standby switch position
- Replies: 12
- Views: 849
Re: standby switch position
Hi and thanks for your feedback.
"What are you hoping to accomplish?"
well, i have the hole drilled and switch. carling off-stby-on.
wanted to lift the CT, would this work? or something like the link valve wizard shows.
series resistor on the switch.
"What are you hoping to accomplish?"
well, i have the hole drilled and switch. carling off-stby-on.
wanted to lift the CT, would this work? or something like the link valve wizard shows.
series resistor on the switch.
- Wed Apr 01, 2020 6:45 pm
- Forum: Technical Discussion
- Topic: standby switch position
- Replies: 12
- Views: 849
standby switch position
Greetings I was wondering want is the best position for the standby switch. 1. after rectifier- before the first filter cap for the plate/ OT. 2. between OT/plate and g2. 3. PT center tap with a full-wave forward rectifier. "3" seems like it may have less stress on the switch but not sure. I've noti...
- Tue Mar 10, 2020 1:31 pm
- Forum: Technical Discussion
- Topic: using led as cathode resistor
- Replies: 9
- Views: 1616