Just got my 69 kit and allready have questions!

redozzman · Post by **redozzman** » Thu Feb 01, 2007 12:33 am

WHen mounting the PT the chassis has three holes with rubber gromets. the instructions say only run the wires through holes that have gromets. It looks like the instructions show the wires going through only two of the three. Is this the proper way? or should I use all three grometed holes?
and should certain wires go through a certain hole?

Secondly, when should I tie off the 220 and 240 taps, should i do it before mounting the PT are after the wires have been run through the rubber gromets. Do I just cut them off are should I just heat shrink the ends and strap them down?

One more. In step 5c it states
Next locate and twist tightly the two black wires from the PT.
These are the heater wires. They attatch to pins 2 and 7 of the
output tube socket farthest from the preamp tube sockets. The
green wire is the center tap for the heater winding which attatches
to the ground lug on the nearby filter cap.

C A second green wire is the bias winding common tap, It should
also be grounded on a lug.

My PT does not have a second green wire. I have a green with yellow stripes is this the wire that is being refered to?

Also after looking ar the wiring diagram for the Heyboer 100 watt pt on the cd. my pt does not have the same color wires pr . Sencodaries are as follows, 2 blue, 2 black, 1 green, 1 white, 1 yellow, 1 green with yellow stripe. Primary is as stated on the Heyboer PT diagram, Orange, Red, Blue, Violet.

I am totally new to this so any help would be great. Yes I am a totall greenhorn.

Flames1950 · Post by **Flames1950** » Thu Feb 01, 2007 7:19 am

Yes, the green with yellow stripe is the center tap wire you're looking for -- ground it.
The 220/240V taps do need to be shrink-wrapped. It usually works out the cleanest to go ahead and bring them through one of the chassis holes with grommets, and tie them at the bottom of one of the wire bulks coming from the power tranny so they're out of sight but safe.

redozzman · Post by **redozzman** » Thu Feb 01, 2007 10:17 am

Thanks!

More to come I'm sure!

redozzman · Post by **redozzman** » Thu Feb 01, 2007 12:03 pm

I have another question/request regarding the buss wire on the pots. I have been searching the forum for information on this and it seems that if you do nothave a really powerfull soldering iron you are going to have problems installing the buss wire on the pots.

Can some on post a good picture of the alternate method of wiring the buss to the pot lugs. A picture is worth a thousand words.

I found one thread that referenced pictures but they were gone.

Thanks

Flames1950 · Post by **Flames1950** » Thu Feb 01, 2007 3:25 pm

A bunch of us have done it this way:

Just bend the grounded lugs straight up and run your buss wire through them.

redozzman · Post by **redozzman** » Thu Feb 01, 2007 3:32 pm

WOW that jtm 100 looks killer,

Thanks for the picture. I am going to be up late tonight!

darrell · Post by **darrell** » Fri Feb 16, 2007 11:01 pm

Your amp is beautiful Those dark color PTP boards Are just all that If you done the build your self my hats off to you spectacular work;>) Can I ask where you obtaned that board? Im building a Jtm45 and I have to have one of those boards "Awsome"I have some of those bell diodes that are rated 600 volt reverse pulse I think are they big enough to use? there 1n1616 here is a link http://www.datasheets.org.uk/specsheet. ... 1616%2BJAN Thanks Darrell