New Amp Build... need a good name? Please Scrutinize!

[mountainhick]

Ran it through start up, flying colors!

Only 10-15 minutes playing time so far. First impression, Telecaster sounds very good on clear settings and with a little hair. Has a lot of bass. With the 10K on V1B cathode, just too thin. I kinda expected that. Haven't cranked it yet though.

I haven;t been able to complete the schematic in DIY layout creator. Seems like the project has reached a memory limit. It stopped working once I got into the power supply section, so here's the pre-power amp:

Initial voltages I didn't take all with the cathode variables yet.:

Wall 122.4 VAC
B+1 266
B+2 262
B+3 243

V1 6NP2
V1A Plate 177.4
V1B Plate 218

V2 6AV6 PI
Plate 186.2

V3 6AQ5
Plate 264
Cathode 18.7
Screen 262

V4 6AQ5
Plate 263
Cathode 18.7
Screen 262

Filaments 3.14 and 3.16

 

[Travis1972]

Cheers, brother.

Do you mean, how did I stick the emblems on? It's easier than it looks.

If that's the question, these die-cast badges have bayonets on the back that are designed to press into a B-clip swaged into the sheet metal of a vehicle's body panel.

So the thing to do is make a paper template by pressing the pins into a piece of paper resting on something soft, like a single layer of terry towel. This will leave little impressions in the paper.

Use an awl or other pointy tool to poke through the paper at each pin location. Cut out the template, lay it on the surface where the badge is going, and set the badge on it. Check to make sure the badge is centered and straight (or oriented the way you want). Without moving the template, lift the badge up. Mark through the template holes. This is where you drill the same diameter as the pins. A tiny bit larger than the pin diameter is a good idea so you don't have to hammer the badge into place.

I use a toothpick to add a tiny bit of Titebond (less than a full drop) in each hole. This helps hold the badge in place since I like a sort of loose press fit. Gently and evenly press the badge down flush.

Mooy Importantay: these emblems are usually made of pot metal (Phillips metal/white metal/etc.), which is extremely brittle and will not endure any sort of abuse, bending, or twisting. It will break if you look at it funny. The chrome will flake off. So be very very gentle with these things.

Note: you can improve the appearance of these badges by applying flat black paint into recesses in 'closed' letters; look above at the O and two E's in the Monterey emblem. Those little recesses will get black paint before I install it.

Lacquering may help with chrome flakage just find a clear that doesn’t change the appearance of the metal ,I believe krylon makes it ,triple thick glaze in spray can format it is what I’ve used for chrome and brass before it lets the natural look come through but puts a hard protective coating on .

 

[lowatter]

Glad it sounds really good and it's a keeper without having to tweak. Any decision on a name yet?

 

[mountainhick]

Glad it sounds really good and it's a keeper without having to tweak. Any decision on a name yet?

Well, we'll see about "really good"... Maybe. At least for clean sounds.

Need to spend more time with it and a selection of guitars to suss it out. A couple things are experimental. I have a few things in mind to possibly play with

- I'll check dissipation and try to find references for the 6AQ5s, I don' know how much they might be goosed.
- We'll see about that 10K Cathode resistor, I am not sure it's that useful without subsequent gain stages
-Initial impression is too much bass at the fatter cathode setting, might play with that in the cathode switch, or tone circuit or cathode bypass cap at the output.

Re: the name, I found a little inspiration from something else unrelated to Princeton or Marshall. I am not too sure I am getting a Marshall vibe from the amp. There's been a Bobcat around, and it left fresh tracks in the snow a couple days ago to remind me. Piggybacks onto @ClashCityTele 's suggestion https://www.tdpri.com/threads/new-a...lease-scrutinize.1126055/page-2#post-11813968

 

[mountainhick]

I am going to move the tech talk to a new thread... With all the name calling I think this is too sidetracked for what comes next for the Bobcat.

 

[CV Jee Beez]

That's a very tidy inside you got there. Really it's so neat. I take it this isn't you first rodeo.
Impressive looking.
Marsh Prince is very logical, and How about a singers name , like "Yma Sumac Special"
She was known as the Inca Princess and sang with ornette coleman before yoko ono
View attachment 1077407

I think she did the original Lion Sleeps Tonight.

 

[CV Jee Beez]

Your amp looks cool. The named you picked is cool too. I like the toroidal PT.

 

[tubeToaster]

Cheers, brother.

Do you mean, how did I stick the emblems on? It's easier than it looks.

If that's the question, these die-cast badges have bayonets on the back that are designed to press into a B-clip swaged into the sheet metal of a vehicle's body panel.

So the thing to do is make a paper template by pressing the pins into a piece of paper resting on something soft, like a single layer of terry towel. This will leave little impressions in the paper.

Use an awl or other pointy tool to poke through the paper at each pin location. Cut out the template, lay it on the surface where the badge is going, and set the badge on it. Check to make sure the badge is centered and straight (or oriented the way you want). Without moving the template,

lift the badge up. Mark through the template holes. This is where you drill the same diameter as the pins. A tiny bit larger than the pin diameter is a good idea so you don't have to hammer the badge into place.

I use a toothpick to add a tiny bit of Titebond (less than a full drop) in each hole. This helps hold the badge in place since I like a sort of loose press fit. Gently and evenly press the badge down flush.

Mooy Importantay: these emblems are usually made of pot metal (Phillips metal/white metal/etc.), which is extremely brittle and will not endure any sort of abuse, bending, or twisting. It will break if you look at it funny. The chrome will flake off. So be very very gentle with these things.

Note: you can improve the appearance of these badges by applying flat black paint into recesses in 'closed' letters; look above at the O and two E's in the Monterey emblem. Those little recesses will get black paint before I install it.

I like your idea. I have an amp that needs this one……

https://lofrev.net/wp-content/photos/2014/07/Hummer-Logo.jpg

 

[lowatter]

I like Bobcat. Great name that's probably not used elsewhere.

 

[Peegoo]

I like Bobcat. Great name that's probably not used elsewhere.

I won't tell if you don't

 

[NTC]

To go with the car badge thing, there was a Mercury Bobcat - a rebadged Pinto.

 

[mountainhick]

To go with the car badge thing, there was a Mercury Bobcat - a rebadged Pinto.

 

[Cosmic Cowboy]

Plexoverb

 

[Peegoo]

Ran it through start up, flying colors!

Only 10-15 minutes playing time so far. First impression, Telecaster sounds very good on clear settings and with a little hair. Has a lot of bass. With the 10K on V1B cathode, just too thin. I kinda expected that. Haven't cranked it yet though.

I haven;t been able to complete the schematic in DIY layout creator. Seems like the project has reached a memory limit. It stopped working once I got into the power supply section, so here's the pre-power amp:

View attachment 1078181

Initial voltages I didn't take all with the cathode variables yet.:

Wall 122.4 VAC
B+1 266
B+2 262
B+3 243

V1 6NP2
V1A Plate 177.4
V1B Plate 218

V2 6AV6 PI
Plate 186.2

V3 6AQ5
Plate 264
Cathode 18.7
Screen 262

V4 6AQ5
Plate 263
Cathode 18.7
Screen 262

Filaments 3.14 and 3.16

I learned something new today that I never caught before. I've known that resistors add noise to a signal--the higher the resistance, the more noise.

With this in mind, It never dawned on me that Fenders use of a 68K grid stopper on the input to V1 was shared by two jacks.

What this boils down to is if you build an amp with a single input jack, go with a 34K grid stopper. Makes for quieter operation. Thank You Pete for adding this little bit of knowledge to my pea-sized brain.

 

[lowatter]

How bout the "Badger" or the "Wolverine"?.

 

[mountainhick]

How bout the "Badger" or the "Wolverine"?.

Good names, but you're late to the party!

 

[tubedude]

Anglotone