Tweakin' a Kalamazoo M2 design...

[lowatter]

Hey guys. It's been awhile since I've posted here and I was hoping that I could get some help in the layout for this little guy. I plan to use it for a harp and living room practice amp. If anyone can upload the pic and the schematic to help adding the rest of the componants and route the wiring I'd really appreciate it. I can add more lugs on the tagboard if necessary. I'll update this .jpg as the suggestions/comments come from you guys. Thanks and it's nice to be back around.
Here's the schematic...
http://www.webphix.com/schematic%20heaven/www.schematicheaven.com/bargainbin/kalamazoo_m2s.pdf


Here's what I have soo far:

[Willabe]

Hi LW,

Looks like your doing fine for a start, but.....       You need to put the R/C values on the layout scheme as you go. PT, input jack and it's preamp tube need to be on opposite sides of the amp so it's quite. Power switch should not be near the input jack/preamp tube for the same reason. And you left out the 6X4 rec. tube. Look at a Fender Champ and Vibro Champ for how it's laid out.

Any reason you picked this amp?

I ask because some guys build a SE 6BQ5/EL84 amp and don't like it. (And to be fair, some do like it.) They end up changing to a SE 6V6, which needs a different socket. Have you heard/played through this amp or 1 like it?

I used to play blues harp when I was younger and I could be wrong but.... I'm not sure a SE 6BQ5 would be as good sounding as a SE 6V6, ie, Champ amp for blues harp. Lots of guys play through those for both harp and guitar.

If you need to re-think this it would be easier now before you build it.
                              

                                            Brad      

[lowatter]

Thanks Brad. The reason I picked this circuit is because it's a parts scanvanger amp. I have most if not all these components around in my shop. As far as what it will sound with a harp, I utubed it and alot of guys seem to like it. I'm not much of a harp player and it's just a fun project to mess with because it's pretty simple and I don't want to spend much time or money on it.

[Willabe]

Sounds good to me then. Just wanted to mention it.

(I changed my post and added some things after looking at your layout some more.)


                    Brad       

[Willabe]

Your input 1/4" jack is drawn as a stereo jack.

Standard input 1/4" jack is NC (normally closed) and shorts the hot/tip to ground with no jack plugged in.  

Look at these;


                              Brad      

[lowatter]

Justa bump with a couple of questions:
-I'm not sure where the sag resistor should be tied in.
-not sure if I'm doing the tremolo layout correctly.
-Can the 1M tremolo pot be just a regular audio taper pot or do I need a RA pot?
If anyone can take the time and help me complete the routing I'd sure appreciate it. I'm open for suggestions and I'm not too proud or experienced to admit my layout mistakes. Thanks guys.

[HotBluePlates]

Can you repost a link to the schematic? I wasn't able to view it.

[lowatter]

The schematic in that link is in .pdf format. I'll add a viewable version to the original post. Here it is and thanks for the interest...

[Willabe]

Now you got. Looks good.   

I'm not sure it's a good idea to rout the trem panel switch past the volume control and right next to the input jack? The trem signal might mess with input because it's such a low signal. I think it should go next to the trem pot.


                   Brad       

[HotBluePlates]

Where did the 1N4007's pop up? I don't see those on the schematic...

EDIT: Wait... Are you building a Stout, or the Kalamazoo? Extra output tube, more filter cap sections, etc. I'm not sure what I'm supposed to be checking...

I need to read ALL of a post first... 

[lowatter]

Thanks dr. Yes, I've read that site thoroughly prior to taking this on. Other than that site, there's not much information available on the web. I guess my goal here is to apply the circuit to a tagboard(or terminal strips) layout so that I can fully understand how to lay this out without error or a messy point-to-point configuration with componants and wires running everywhere. I do see ALOT of errors I've made soo far and it looks like I've got a ways to go. I'm no amp bench tech nor do I have the skills to design a circuit. I am kinda resourcefull however and I try to do as much research prior to taking on a project. TubeGeek is on vacation for a few weeks so I can't pick his brain right now and I was hoping to get some help from this forum in the layout to get this amp up and runnnig soon.
As far as transformers, I need to take some readings of the ones I have available and see if they will work for me. I just thought that it might be a fun circuit for others to help develop for giggles.
Again, I'll try to make advancements in the layout and correct errors as I can find the time. I'll update the original post layout as I do. Thanks again for any help.

[DummyLoad]

SSR mod schematics attached. 

i ran PSU designer2 for PS - voltages given are from that simulation with the power transformer specified. current demands were calculated based on the telemetry provided.

i'd strap the OT for 5K reflected Z.

--DL

[sluckey]

Do you have an existing tag strip that you plan to use? If so, how many rows? How many terminals in each row? Or,,,, do you plan to start with a blank board and load it with turrets, kinda Hoffman style? Will you use a multi-cap can or individual filter caps? If individual caps, will they be mounted on the board?

[sluckey]

Here's the pdf...   http://home.comcast.net/~seluckey/kz.pdf

Found this pic on my desktop...

EDIT... corrected wiring error on input jack. Changed image format to remove jpg artifacts.

[lowatter]

THANKS SOO MUCH SLUCKEY! That just save me many hours of head scratching and pleading for help. Did you have this from before or did you just draw it up? Beautifully drawn and just what I was looking for. Yes, I plan on probably using tag strips instead of a board because I can just pick them up locally and really I'm not too concerned with asthetics. Man, you guys are great here.
Now I have to take some readings of the trannies I have available to see if I can use them.
I'll post some updates of the build progress.

[Willabe]

Found this pic on my desktop...

Did you have this from before or did you just draw it up?

Look at the top left corner of the drawing, look at the date.

THANKS SOO MUCH SLUCKEY! You sir are a blessing for me right now.

Yep and for all of us.        

                                     Brad        

[sluckey]

No secret. I'm just trying to contribute something useful to the forum.

...Huck

[DummyLoad]

SSR mod schematics attached. 

i ran PSU designer2 for PS - voltages given are from that simulation with the power transformer specified. current demands were calculated based on the telemetry provided.

i'd strap the OT for 5K reflected Z.

--DL

If my memory serves me correctly, this amp was developed in the 60's, and I'll go out on a limb stating PSU designer2 did not exist.  The O/T specified was 4-5K, its still nice to know that the slide rule era guys made predictable designs.  (I own a Fedrick-Post II)

HBP, those diode numbers, I believe came from a suggested mod to the K... M2. 

The discussion within this thread talk about how the jacks were drawn.  The schematics originally posted also appear on a  K... M2 website. Thanks for the heads up.

Errr... you're welcome. I guess?

--DL

[plexi50]

Here's the pdf...   http://home.comcast.net/~seluckey/kz.pdf

Found this pic on my desktop...

Dam Steve you should be in the PDF designer business. All your files are impeccable. How many more USB hardives can a man have to store all of these files on?  Im at 3 hardrives so far and one USB which i have to transfer to a hardrive every 6 months or so

[sluckey]

Hard drives? How quaint. Get a bucketful of SD chips and don't look back. 

[John]

Mozy is your friend for automatic backups.

[sluckey]

I was just kidding about the SD cards. Their small size is also a curse. Too easy to lose! I actually have two each 2.5" 500GB SATA drives in small cases. The cases are the same size as the drives and have a USB interface. And I carry a 8GB San Disk Cruzer on my key chain. 8GB has always been sufficient for all 'My Documents' folder structure plus a movie or two.