Heathkit - TA-28

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
Post Reply
User avatar
gori
Information
Posts: 19
Joined: 19 Aug 2007, 06:13
Location: japan
Been thanked: 4 times
Contact:

Post by gori »

Hello.

I see connection diagrams of HEATHKIT TA -28 well, but there are little the inside images.
It is the image which it found at auction.
Image

It is the layout that it watches a connection diagram from this image, and it thought about.
Image

When there was a mistake, please teach it.
I am sorry in strange English.

User avatar
snail
Solder Soldier
Information
Posts: 202
Joined: 30 Aug 2007, 00:41
Been thanked: 2 times

Post by snail »

Thank you Gori!!

Do you know if this is the dirt box mike farner used inside his messenger guitar??

Snail

User avatar
MoreCowbell
Transistor Tuner
Information
Posts: 1101
Joined: 06 Aug 2007, 14:39
Been thanked: 15 times
Contact:

Post by MoreCowbell »

SCHEMATIC FOR REFERENCE....

Image

User avatar
gori
Information
Posts: 19
Joined: 19 Aug 2007, 06:13
Location: japan
Been thanked: 4 times
Contact:

Post by gori »

snail hello.
It is written such a thing that I read his interview.
I am a fan of MARK FANER.
I was troubled.
I made several FUZZ with a connection diagram of TA -28, but a sound same as him does not come out.
There are many mysteries.

The sound will be enabled with his messenger guitar and WEST guitar amplifier.

Because his environment was not available, I made the woolly mammoth which became the topic in this site.
I think that it is a sound to resemble closely.

http://www.inet-shibata.or.jp/~gori/markf/themove.mp3

However, there is not the woolly mammoth in those days.

I am sorry in strange English.

User avatar
bajaman
Old Solderhand
Information
Posts: 4549
Joined: 26 Jun 2007, 21:18
Location: New Brighton, Christchurch, NZ
Has thanked: 595 times
Been thanked: 2056 times

Post by bajaman »

I am sorry in strange English
No problem - we understand - thank you for the pictures :wink: :D :D
bajaman

User avatar
snail
Solder Soldier
Information
Posts: 202
Joined: 30 Aug 2007, 00:41
Been thanked: 2 times

Post by snail »

Thanks again Gori, and you make yourself perfectly clear!

I guess the west amp plays a part too.

I've allways been facinated with mike's tone on "got this thing on the move" song from the red album, but never could dial it in. One of the most wicked fuzz tones ever recorded IMHO.

If anyone has any input on this one I'll be really glad to hear.

snail

User avatar
modman
a d m i n
Information
Posts: 4890
Joined: 19 Jun 2007, 16:57
Has thanked: 4394 times
Been thanked: 2131 times

Post by modman »

MoreCowbell wrote:SCHEMATIC FOR REFERENCE....

Image
Guys,
Did anybody save the schematic? Link is dead.
Going through this folder to index it, trying to get to page 8 :lol:

thanks
Please, support freestompboxes.org on Patreon for just 1 pcb per year! Or donate directly through PayPal

User avatar
analogguru
Old Solderhand
Information
Posts: 3238
Joined: 26 Jun 2007, 13:58
Been thanked: 124 times
Contact:

Post by analogguru »

Boaaahhh.....since eons there:
http://analogguru.an.ohost.de/001/schem ... _TA-28.gif

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.

User avatar
RLBJR65
Resistor Ronker
Information
Posts: 280
Joined: 30 Jun 2007, 16:07
Location: USA
Been thanked: 3 times
Contact:

Post by RLBJR65 »

I traced it for practice when the pics were posted. https://img120.imageshack.us/img120/4679/ta28qg6.gif

Funny how different the tone control looks when it's not drawn out in a more customary manor like in AGs schem.
I guess it's just the way you get used to seeing things.

User avatar
spooktone
Information
Posts: 2
Joined: 20 Apr 2008, 23:49

Post by spooktone »

howdy i have a ta-28 i just got pots say 66' so i was wondering anyone know where the best place i can put a trip pot (internal) on the q1 to boost vol drop out?its all stock alot dry caps but i built a quck proto and was wondering anyone know whats best place to plop a trimmer inside i have schematic i drew out but?? anyone know email hensteeth@gmail.com :shock: i want to fix the drop out i heard someone long ago tell me ya can take a resistor out and drop a trimmer pot inside and it will give a nice unity gain boost to fix the fuzz to be louder w/out drop out,i have a shin-ei fuzz does same thing i just donyt wanna trash the vintage units all garage finds but good ones!!!!!!!!!!i did find a way to get 2 tones from the shin ei w/a wire and spdt mini switch..get the nasal and thicker tone nice find..anyone know email id be grateful...i have tons vintage op amps trsans,caps ect talk shop new to posts older guy into tone...thanks neat site fellas..spooky59........

User avatar
analogguru
Old Solderhand
Information
Posts: 3238
Joined: 26 Jun 2007, 13:58
Been thanked: 124 times
Contact:

Post by analogguru »

please use the search function before you start a new topic.

thanks,
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.

User avatar
royaltoots
Breadboard Brother
Information
Posts: 88
Joined: 07 Oct 2007, 17:55
my favorite amplifier: Davoli Studio 60
Location: London
Has thanked: 3 times
Been thanked: 5 times

Post by royaltoots »

spooktone wrote:howdy i have a ta-28 i just got pots say 66' so i was wondering anyone know ....
on this schematic, put a jumper across R8 for minimum intervention, or replace it with a 10K trimpot if you prefer...

Image

Post Reply