Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: LooseChange on August 16, 2011, 08:10:44 pm

Title: teisco checkmate 50 amp - BULB QUESTION below
Post by: LooseChange on August 16, 2011, 08:10:44 pm

Just got this in. The coupling caps are leaky (as usual) and Filter caps need replacing too.
This amp is true point to point and it's got some weirdness.
Check out the schematic (best I could find) and look at the E-OSC device. When you flip a switch it plays a tone mixed in with the guitar. Don't know why you want that.

Title: Re: teisco checkmate 50 amp
Post by: sluckey on August 16, 2011, 08:31:07 pm

E-OSC... Plays an E note for tuning. Gretsch did that on several amps too. Handy back in the day.

Title: Re: teisco checkmate 50 amp
Post by: LooseChange on August 16, 2011, 09:21:17 pm

Jeez.. I'm so dumb.

Title: Re: teisco checkmate 50 amp
Post by: TubeGeek on August 17, 2011, 12:40:32 am

 :l2: :laugh:

Title: Re: teisco checkmate 50 amp
Post by: Willabe on August 17, 2011, 01:22:07 am

No, it's for playing eastern world music.

It's for a drone tone, key of E.          :m20


          Brad        :icon_biggrin:           

Title: Re: teisco checkmate 50 amp
Post by: John on August 17, 2011, 06:13:51 am

We've just all gotten spoilt with the $20 clip on tuners. I had someone not that long ago look at my old pitch pipe I used to use, and ask what it was.

Title: Re: teisco checkmate 50 amp
Post by: Madison on August 17, 2011, 09:14:25 am

That was my first question was "what key?".

Hey, at least they were aiming for rock and roll with the key of E!

Or else it would have been to the orchestral tuning key of A.Me thinks not.

Any way to hook a pot, or something, up to it on a wha pedal to get different keys?

Title: Re: teisco checkmate 50 amp - BULB QUESTION below
Post by: LooseChange on August 18, 2011, 05:23:29 pm

I can't figure out what type of bulb this is other than it's 6.3 volt because I can't take it out.
How does this bulb come out??


Madison, Buckethead is in town next week.

Title: Re: teisco checkmate 50 amp - BULB QUESTION below
Post by: PRR on August 18, 2011, 05:31:38 pm

Get rubber hose a little smaller inside than the bulb. Push in a bit, turn counter-clockwise 1/8 turn, it should jump out. Just like a 1940s-1980s car tail lamp bulb.

Title: Re: teisco checkmate 50 amp - BULB QUESTION below
Post by: LooseChange on August 18, 2011, 05:53:17 pm

So, it's a bayonet style? Like the #47 but half the size. It's blown so I need to replace it. Do you know what it's # is? Thanks!

Title: Re: teisco checkmate 50 amp - BULB QUESTION below
Post by: LooseChange on August 18, 2011, 06:13:32 pm

Great idea! I used a piece of heat shink tube. BUT... It was a screw out type!

Title: Re: teisco checkmate 50 amp - BULB QUESTION below
Post by: Madison on August 19, 2011, 01:04:37 am

>>It was a screw out type!

I have a few in the bin for these oldies.

>>Madison, Buckethead is in town next week.

Wish I could go!

Title: Re: teisco checkmate 50 amp - BULB QUESTION below
Post by: PRR on August 20, 2011, 12:47:18 am

> BUT... It was a screw out type!

Shove a drill through. Goo an LED inside the holder. Infinite life.

Sorry about the bum steer.

Title: Re: teisco checkmate 50 amp - BULB QUESTION below
Post by: LooseChange on August 20, 2011, 06:47:11 am

Rat Shack had them! Thanks!!!