Search found 119 matches

by lovetoboogie
Thu May 03, 2018 11:16 am
Forum: Vintage Amps (Before 1991)
Topic: Mark 1 Reissue Question
Replies: 7
Views: 2425

Re: Mark 1 Reissue Question

Good amp as far as an off the shelf Boogie Mark I... The circuit is a near faithful recreation of a late 70's Mark I. The presence and negative feedback loop are altered but can be modded if you want a true period correct Mark I. They still seem to get roughly $750.00 to $1500.00 depending on cab/he...
by lovetoboogie
Fri Apr 20, 2018 9:44 am
Forum: Mark Series
Topic: Mk iic Lead Master not working
Replies: 2
Views: 1413

Re: Mk iic Lead Master not working

Hi. I've just bought a Mkiic and I don't think that the Lead Master control is working as it makes no difference to the sound at all yet the Master 1 controls the volume for both channels. However, the volume is about the same when switching between both channels. Any advice gratefully received Man...
by lovetoboogie
Fri Mar 30, 2018 7:32 am
Forum: Mark Series
Topic: '81 Mark IIB Troubleshooting - blowing fuses
Replies: 12
Views: 5480

Re: '81 Mark IIB Troubleshooting - blowing fuses

bluelair wrote:Do I need to add anything else to the circuit?
No, its wired as the original...
by lovetoboogie
Thu Mar 29, 2018 9:36 pm
Forum: Mark Series
Topic: '81 Mark IIB Troubleshooting - blowing fuses
Replies: 12
Views: 5480

Re: '81 Mark IIB Troubleshooting - blowing fuses

that PT will give you 330-0-330 VAC...after its rectified it will be 450VDC... its the correct replacement...
by lovetoboogie
Wed Mar 28, 2018 11:00 pm
Forum: Mark Series
Topic: Mark III pictures & hints- need your help
Replies: 6
Views: 2870

Re: Mark III pictures & hints- need your help

No...you definitely DON'T want to use a 1/2w there. That 680 ohm is part of the low voltage supply and generally a known weak spot on Mark III's... If anything you would do better with a 2w or 5w Metal Oxide there. I have seen many a Mark III with a hole in the PCB there as that 680ohm sees too much...
by lovetoboogie
Wed Mar 28, 2018 6:09 am
Forum: Mark Series
Topic: Mark III+ Video [DIY]
Replies: 3
Views: 1464

Re: Mark III+ Video [DIY]

That is a great example of what I call "The Ka-Chunk"... Sounds great man. Focused and tight...
by lovetoboogie
Tue Mar 27, 2018 12:41 pm
Forum: Vintage Amps (Before 1991)
Topic: Did the 100/60 Mark I Use the 100-162318 Transformer?
Replies: 2
Views: 1279

Re: Did the 100/60 Mark I Use the 100-162318 Transformer?

Yes... my all original 76' 60w has a 60-162318 PT and a Fender OT
by lovetoboogie
Fri Mar 23, 2018 12:01 am
Forum: Mark Series
Topic: '81 Mark IIB Troubleshooting - blowing fuses
Replies: 12
Views: 5480

Re: '81 Mark IIB Troubleshooting - blowing fuses

bluelair wrote:
I think I'm on to something and it's seeming like it may be the power transformer. Anyone know where to source one?

Stamping on the top says:

MESA
60-162318
EIA606-838
http://www.classictone.net/40-18005.html
by lovetoboogie
Mon Mar 05, 2018 11:26 pm
Forum: Mark Series
Topic: Electrolytic Caps
Replies: 5
Views: 2125

Re: Electrolytic Caps

Those ones you have circled are for the various low voltage supplies. They are filter caps for bias, eq supply and vactrol voltage supply...
by lovetoboogie
Mon Feb 26, 2018 3:18 pm
Forum: Vintage Amps (Before 1991)
Topic: Need help with MK II wiring
Replies: 3
Views: 1911

Re: Need help with MK II wiring

Ah, yes...I see you indicted that. No, this wire looks to be part of a mod when those bias and filter caps were replaced. Those resistors that you noted are part of the rectified negative bias voltage that wind up on pin 5 of the power tubes. It looks like some one rearranged the layout a bit and th...
by lovetoboogie
Sun Feb 25, 2018 8:45 pm
Forum: Vintage Amps (Before 1991)
Topic: Need help with MK II wiring
Replies: 3
Views: 1911

Re: Need help with MK II wiring

That is most likely the screen voltage supply for the power section. Trace back from your power tube sockets(pin 4) and you should see some large 470 ohm 2W Resistors. They all join together on one rail on the power amp board...which on old Mark series amps will have "448v" notated nearby...
by lovetoboogie
Sat Jan 20, 2018 6:57 pm
Forum: Mark Series
Topic: Mark I Boogie with Hardwood Cabinet serial B0020
Replies: 5
Views: 2762

Re: Mark I Boogie with Hardwood Cabinet serial B0020

Looks to be a roughly late 75' or 76' Mark I 1x15"... but someone replaced the front baffle to mount that 12" Celestion. All the Mark I serial numbers beginning in B were 15" models. I have B068 and its dated 12/76... You defininately have a killer piece of early Boogie history there... would be nic...
by lovetoboogie
Mon Nov 27, 2017 12:33 am
Forum: Vintage Amps (Before 1991)
Topic: Neil Young's early Boogies up for auction...
Replies: 12
Views: 7107

Re: Neil Young's early Boogies up for auction...

Its a weird setup...the whole auction thing. I see there is already a bid on the 74' Mark I 1x12" combo. So does that mean you can register ahead of time and enter a bid before the official start of 12/9?
by lovetoboogie
Fri Nov 10, 2017 10:16 pm
Forum: Vintage Amps (Before 1991)
Topic: Mark III Pull Deep Cap Value
Replies: 5
Views: 2312

Re: Mark III Pull Deep Cap Value

Any 10uf-15uf polarized tantalum molded capacitor will work. There is not alot of voltage on that Pull Deep circuit since its only a cathode mod. The one in your picture is a Kemet 15uf/25v Tantalum bypass cap...Most if not all Mark III's use them there. Can't confirm that it is C203 though since I ...