Search found 5942 matches

by Phil_S
Mon Apr 15, 2024 1:20 pm
Forum: Technical Discussion
Topic: Yet Another Two Stroke build
Replies: 11
Views: 268

Re: Yet Another Two Stroke build

Ah, thank you. So when they say 7000K primary/4,8 ohm secondary, that's not actually correct, as it's 7000K to 8ohms, and 3500K to 4ohms.... That explains some of the things in Dave's book that weren't clear, like why you might want to plug an 8ohm speaker into the 4ohm secondary when you run a 6V6...
by Phil_S
Mon Apr 15, 2024 12:27 pm
Forum: Technical Discussion
Topic: Output Transformer formula?
Replies: 6
Views: 193

Re: Output Transformer formula?

RC-30 free download: https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/RCA-Books/RCA-Receiving-Tube-Manual-1975-RC-30.pdf&ved=2ahUKEwj-uo2gm8SFAxVSE1kFHRfvAKQQFnoECBkQAQ&usg=AOvVaw06CiaA1VtQZwzt6GfDD5AD Not as nice as having ...
by Phil_S
Wed Apr 10, 2024 4:59 pm
Forum: Technical Discussion
Topic: Need help tweeking a schematic for 6k6 amp
Replies: 16
Views: 286

Re: Need help tweeking a schematic for 6k6 amp

You didn't say what you'd like to see for plate voltage on the 6K6's. Instead of the 325-0-325 PT, I might go down to 275-0-275. I didn't do any calculations, so this is a SWAG. There isn't that much difference between 6V6 and 6K6. Aside from the choice of PT, I'd probably build it as shown.
by Phil_S
Mon Apr 01, 2024 8:38 pm
Forum: For Sale/Trade
Topic: PSA Hammond transformer blowout
Replies: 29
Views: 6791

Re: PSA Hammond transformer blowout

Max,
Even if that were so, you are probably invisible. I know I am.
Phil
by Phil_S
Mon Apr 01, 2024 1:59 pm
Forum: For Sale/Trade
Topic: PSA Hammond transformer blowout
Replies: 29
Views: 6791

Re: PSA Hammond transformer blowout

I'm reasonably sure most of us have a story like that. My rule of thumb on eBay is don't spend more than you are willing to lose. I keep my expectations low. I'm generally well rewarded. I had one incident where "my package" was delivered (supposedly) in San Francisco. I live in Baltimore. Details n...
by Phil_S
Mon Apr 01, 2024 1:50 pm
Forum: Speakers and Cabinets
Topic: Speaker Cabinet Handle Screws
Replies: 9
Views: 373

Re: Speaker Cabinet Handle Screws

T-nuts have their place. In general, I'm not particularly fond of using them. In harder woods, I find the spikes bend over too easily rather than driving into the wood. They are fine for pine and plywood. I've grown to prefer threaded inserts over T-nuts. In any case, without a compelling reason or ...
by Phil_S
Sun Mar 31, 2024 8:56 pm
Forum: Speakers and Cabinets
Topic: Speaker Cabinet Handle Screws
Replies: 9
Views: 373

Re: Speaker Cabinet Handle Screws

What is the objection to a through hole so you can use a washer and nut on the inside? That will be sure to hold the weight. If the screws are too long, they can be sawed off. This is simplest, least expensive, and sure to work as desired.
by Phil_S
Thu Mar 28, 2024 1:55 pm
Forum: Speakers and Cabinets
Topic: Drilling holes prior to covering in Tolex?
Replies: 5
Views: 220

Re: Drilling holes prior to covering in Tolex?

Haven't done it yet but plan to soon. I'll drill then use an old tip on my soldering iron, then keep the (probably ruined) tip for future plastic melting tasks. If I miss any holes I'll melt one with the soldering iron prior to drilling. You may be overthinking this. I'd just puncture the vinyl to ...
by Phil_S
Mon Mar 18, 2024 11:22 pm
Forum: Technical Discussion
Topic: Heater Wires - Elevate or Twist?
Replies: 18
Views: 673

Re: Heater Wires - Elevate or Twist?

Use zip cord (lamp cord.) No need to twist.
by Phil_S
Thu Mar 14, 2024 1:48 pm
Forum: Technical Discussion
Topic: Cathode resistor and IM distortion
Replies: 23
Views: 555

Re: Cathode resistor and IM distortion

mike-p wrote: Tue Feb 13, 2024 7:53 pm Tried to pm you but its stuck in my outbox?
For better or worse, it remains stuck until the recipient reads it. <shrug>
by Phil_S
Mon Mar 11, 2024 12:25 am
Forum: Technical Discussion
Topic: Help with circuit
Replies: 18
Views: 415

Re: Help with circuit

Not your question...it looks like you can use some basic help on how to solder. Attached has an excellent tutorial. Some of those solders are fine, others need to be redone. Also, clean off the flux with 90% isopropyl alcohol with a rag or q-tip. Thanks for the tip, im working on it this is my firs...
by Phil_S
Sun Mar 10, 2024 5:13 pm
Forum: Technical Discussion
Topic: Help with circuit
Replies: 18
Views: 415

Re: Help with circuit

Not your question...it looks like you can use some basic help on how to solder. Attached has an excellent tutorial. Some of those solders are fine, others need to be redone. Also, clean off the flux with 90% isopropyl alcohol with a rag or q-tip.
by Phil_S
Sun Mar 10, 2024 12:09 am
Forum: Technical Discussion
Topic: 2024 Monkeymatic Liverpool (nontraditional)
Replies: 48
Views: 1382

Re: 2024 Monkeymatic Liverpool (nontraditional)

Icelandic works better than Choboni. The containers are rectagular. Icelandic changed its formula. My wife doesn't buy them anymore. :shock:
Nice stuff you're doing there!
by Phil_S
Sat Mar 09, 2024 4:18 pm
Forum: Garage Talk
Topic: Metal cutters: Ok. I have the profile
Replies: 5
Views: 242

Re: Metal cutters: Ok. I have the profile

Stack them up and make epoxy club sandwiches. 3 of them with epoxy will be around .7mm and 2 of them will be around .5mm.
BTW, I have no idea WTF you are talking about.