Gretsch - Playboy ( = Jen - HF-Modulator )  [schematic]

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
Post Reply
User avatar
MoreCowbell
Transistor Tuner
Information
Posts: 1101
Joined: 06 Aug 2007, 14:39
Been thanked: 15 times
Contact:

Post by MoreCowbell »

Another Jen product...

SCHEMATIC AND PROJECT FILE

Check correct schematic below.
  • Orientation of Q2 is wrong, C and E need to be switched
  • C4 = 220pF, not 0.0022uF
Attachments
n3eidvfx40x8yiubg2ct.jpg
fzu5cza6vekox4y4ewgw.jpg
nyevsfui2x3enw9lwy6j.jpg
gwtnrfjfwycuffbyxtjc.jpg
tgzebi5kseqlmptxhcy4.jpg
vvazff7mjv8uyw0laq1i.jpg
hvhyiiezpe3m9d9fg55f.jpg
udyh1y0yfurmniu8iquu.jpg
cykibzf7m061xvkuhi6p.jpg
skfhjl6mu7lzhxoolcc9.jpg


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

Post by analogguru »

And again a case of a wrong schematic......
even when a correct one exists for more than three years:
http://analogguru.an.ohost.de/001/schematics/Jen_HF-Modulator.gif

Image

IMHO that´s unserious business not to update the files and by this help the people to make their units work properly.

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

User avatar
sonicvi
Solder Soldier
Information
Posts: 160
Joined: 30 Dec 2007, 07:17
Been thanked: 8 times

Post by sonicvi »

So is this thing just a really high speed tremolo basically? Anyone have any clips of one?

User avatar
amsmith3
Information
Posts: 4
Joined: 10 Jul 2010, 15:29

Post by amsmith3 »

Just transcribed this vero layout to a schematic... transistor Q3 has collector going to earth, this doesn't seem right? I've just finished building this pedal using the ggg schematic which I can confirm is WRONG.

User avatar
amsmith3
Information
Posts: 4
Joined: 10 Jul 2010, 15:29

Post by amsmith3 »

Does your schematic match that one?
Yes, it does. My bad. :slap:

I'll alter my circuit to match this and see what happens...

User avatar
amsmith3
Information
Posts: 4
Joined: 10 Jul 2010, 15:29

Post by amsmith3 »

Hokay, built the vero design. Works fine now. Not much modulation though. It's a nice tone that comes through, with a little bit of resonance but nothing like in the audio samples on the french page. Anyone else get similar results?

User avatar
amsmith3
Information
Posts: 4
Joined: 10 Jul 2010, 15:29

Post by amsmith3 »

Thanks for the sample, that's pretty similar to what mine sounds like. Thanks for your help on this one guys.

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 »

  • updated the first post with new pictures
  • restored dead links
  • added the correction
Please, support freestompboxes.org on Patreon for just 1 pcb per year! Or donate directly through PayPal

User avatar
Rambozo96
Breadboard Brother
Information
Posts: 51
Joined: 07 Oct 2018, 23:01
Completed builds: Superfuzz’s, Mosrite Fuzzrite, various Tonebenders, some oddball Russian stuff, MXR Distortion II, modded various DOD pedals to true bypass, opamp Big Muff.
Has thanked: 10 times
Been thanked: 40 times

Post by Rambozo96 »

I can see it’s a tremolo with a fast LFO speed. I wonder how well it would work if you lowered the 47n caps to something else? Could be a fun mod to include for anyone wanting to build one.

Post Reply