In recent times, Postimage, where I have stored the images of this topic, has been experiencing problems. I'm slowly fixing this, but it's still not all right. I hope you understand.
Cheers
Search found 101 matches
- Wed May 02, 2018 1:45 am
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
- Tue Mar 28, 2017 3:03 am
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Really! This scheme was for a short time with the active link.
And it would have been lost, were it not for our good friends, who did the favor of keeping the file for us:
http://www.handmades.com.br/forum/index ... #msg171267
Enjoy
And it would have been lost, were it not for our good friends, who did the favor of keeping the file for us:
http://www.handmades.com.br/forum/index ... #msg171267
Enjoy
- Tue Mar 14, 2017 12:32 am
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hi 10thTx There are still bugs in your layout. :( The NFB should be connected to turret 19, on pin 7 of V2. Also the transformer connections have to be made with more care. As it stands, the NFB turns into PFB, and the amplifier gets noisy, and some oscillations. Follow the schematic exactly to make...
- Sat Mar 11, 2017 6:40 pm
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello. It's great that people make their own layouts. The schematics too. They always tell me that my schemes are confusing, but I relied on PCBs to form the groups of components. There is no problem in reissuing. Just do not remove information, such as the working voltage of the capacitors, or the ...
- Wed Aug 31, 2016 2:28 pm
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello guys. Many may have wanted to create your own amp 1W, but do not know if it will be good. Here is a video and sample of axehack , who set up his own JTM1. Link: https://www.youtube.com/watch?feature=player_embedded&v=bL4m4kCeHAE The description is in TDPRI Forum at this link: http://www.tdpri....
- Sat Jun 13, 2015 2:25 pm
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello odrpol
At first, the scheme is the most correct.
Not that the layout does not work.
There is information that the "A" section of 12AX7, pins 6,7 and 8, produce less noise. Then, for most assembly the "A" section comes first.
But as the work would not have problems.
Cheers
At first, the scheme is the most correct.
Not that the layout does not work.
There is information that the "A" section of 12AX7, pins 6,7 and 8, produce less noise. Then, for most assembly the "A" section comes first.
But as the work would not have problems.
Cheers
- Sat Jun 13, 2015 12:45 pm
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello odrpol Would not this inversion amplification stages of the valves, it is the big problem. The amplifier equal work. What goes wrong on your amp tensions are appearing in places that should not appear. When you showed the first schemes to measurements without the valves , everything was wrong....
- Tue Jun 09, 2015 12:39 am
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello odrpol. Here is the schema "my" JTM1 with the measured voltages to the valves. There are no mistakes in the assembly, and these tensions were measured several times and remained stable. An error that exists in my schemes published before is the value of R31. appearing as 2,7k, but it is actual...
- Sun Jun 07, 2015 9:39 pm
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello odrpol The pin 5, as you know, is the power of the heaters. If there is a wrong contact, he can do what you said, but it is rare. Make sure the valve pin is not oxidized, and if the socket is in good condition. If so, replace it The valve 12AU7 heats up more than the others, obvious, there is ...
- Sun Jun 07, 2015 2:19 pm
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello odrpol I got explanations about the layout. Talking about the heaters. If your transformer has 6.3V for the heaters, the V1 and V2 valves are with the right connections; V3 is already wrong, because it should also be with the pin 4 and pin 5 connected. In case the connection between the pin 9 ...
- Thu Jun 04, 2015 11:20 pm
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello odrpol I have some questions: As you had stated, these measurements were made without the valves. No valves, no current consumption, then every source voltage would be close to the maximum in all the terminals of the anodes of the valves in the circuit. Approximately 295v there in your circuit...
- Wed Jun 03, 2015 10:36 pm
- Forum: Marshall Discussion
- Topic: Anderton '64 reissue JTM145 - any info?
- Replies: 442
- Views: 119125
Re: Anderton '64 reissue JTM145 - any info?
Hello odrpol If you are really made these measurements without the valves, it is almost everything wrong. If you did with the valves, it is still incorrect. Within a few days I will make measurements on my amp, and post here for comparison. Provide some pictures of your amp and post here. Cheers Mat...
- Tue May 19, 2015 5:43 pm
- Forum: Marshall Discussion
- Topic: Wanted by internal images of JMP1H or C
- Replies: 7
- Views: 4045
Re: Wanted by internal images of JMP1H or C
Can you explain how it was "nothing like the real deal"? What would be needed for you to consider a 1 Watt amp to be the "real deal"? I was curious too ... :) I do not have new pictures of the inside of JMP1. The only photo I found on the Net is this. [img:852:514]http://s26.postimg.org/8cumg5e6h/J...
- Fri Apr 24, 2015 1:49 am
- Forum: Marshall Discussion
- Topic: Wanted by internal images of JMP1H or C
- Replies: 7
- Views: 4045
Wanted by internal images of JMP1H or C
Who has an amplifier JMP1 and want to contribute, please post the pictures here.
Accepts photos of both sides of the main pcb and toneboard.
Preferably images with high resolution.
(If moderation does not agree with this topic, please, remove it)
Accepts photos of both sides of the main pcb and toneboard.
Preferably images with high resolution.
(If moderation does not agree with this topic, please, remove it)
- Sun Jan 18, 2015 2:28 pm
- Forum: Marshall Discussion
- Topic: JTM1 Impedance Issue
- Replies: 41
- Views: 9203
Re: JTM1 Impedance Issue
Littlewyan I do not know exactly what might be wrong with the tone of your amp. But let me ask you: Have you tried to reduce the NFB resistor (R15) to half of its value? (And while increasing C11 to double the amount). Let me explain my idea. IF by chance the actual impedance of the OT is 10K, the N...