Search found 119 matches
- Mon Jul 10, 2017 1:08 am
- Forum: Marshall Discussion
- Topic: Bias Supply Droppers
- Replies: 21
- Views: 6703
Re: Bias Supply Droppers
As the thread title indicates, those are voltage-dropping resistors. The value of these Rs depend primarily on the voltage of the secondary. Think about it the same way you think about the HT supply. The first cap is a 'reservoir' cap that is followed by another PI filter (dropping R and cap). You'l...
- Mon Dec 19, 2016 5:02 am
- Forum: Garage Talk
- Topic: Stage Craft Gear Gone?
- Replies: 6
- Views: 1894
Re: Stage Craft Gear Gone?
I think Anthony sold the company.
- Fri Sep 02, 2016 12:11 am
- Forum: Technical Discussion
- Topic: London Power Standard - finished pic and soundclip
- Replies: 47
- Views: 7494
Re: London Power Standard - finished pic and soundclip
V2 - After rolling a bunch of tubes through the preamp, I found that a JJ 12AX7MG for V1 and JJECC803 for V2 sounded best to me. I tried some Mullard and TungSols as well but didn't like them as much. Did you use the LTPI from TUT5? The latest version uses a gain stage + Cathodyne PI - I used a 12A...
- Sun Aug 28, 2016 3:14 am
- Forum: Technical Discussion
- Topic: London Power Standard - finished pic and soundclip
- Replies: 47
- Views: 7494
Re: London Power Standard - finished pic and soundclip
apologies for the delay. the noise was due to a bad pot (master, if I recall). The amp turned out pretty good. I'd like to try a 25 watt variant, though....stephenl wrote:V2, how did yours turn out? Did you resolve the noise issues?
- Wed Jun 29, 2016 11:31 pm
- Forum: Marshall Discussion
- Topic: reducing the signal to the PI on a 2204
- Replies: 33
- Views: 6163
Re: reducing the signal to the PI on a 2204
would it help to add a resistor between the coupling cap and the PI? The answer is yes. Such a series R will form a voltage divider with the 1M grid leak in the PI. So if you add 1M series R, you'd drop the signal in half The LTP grid reference resistors are subject to local and global negative fee...
- Tue Jun 28, 2016 1:50 am
- Forum: Marshall Discussion
- Topic: reducing the signal to the PI on a 2204
- Replies: 33
- Views: 6163
Re: reducing the signal to the PI on a 2204
I'm going to return to the original question in the first post. That is, would it help to add a resistor between the coupling cap and the PI? The answer is yes. Such a series R will form a voltage divider with the 1M grid leak in the PI. So if you add 1M series R, you'd drop the signal in half. The ...
- Tue May 03, 2016 1:27 am
- Forum: Technical Discussion
- Topic: Sovtek Mig60 gain loss/high channel
- Replies: 7
- Views: 1211
Re: Sovtek Mig60 gain loss/high channel
did you try replacing whatever preamp tube is used by just that input?
- Sun Apr 24, 2016 3:12 am
- Forum: Technical Discussion
- Topic: TW iron in a high-gain Marshall-inspired build?
- Replies: 6
- Views: 1291
Re: TW iron in a high-gain Marshall-inspired build?
thanks guys!
- Tue Apr 05, 2016 11:16 pm
- Forum: Technical Discussion
- Topic: TW iron in a high-gain Marshall-inspired build?
- Replies: 6
- Views: 1291
TW iron in a high-gain Marshall-inspired build?
Has anyone used TW iron in a higher-gain Marshall style amp (with at least 2204 preamp gain)? If so, how did it work out? How did it change the Marshall tone?
- Tue Apr 05, 2016 2:49 pm
- Forum: Technical Discussion
- Topic: London Power Standard - finished pic and soundclip
- Replies: 47
- Views: 7494
Re: London Power Standard - finished pic and soundclip
sounds great!
- Mon Jan 11, 2016 1:59 am
- Forum: Technical Discussion
- Topic: PSA: Cheep Heyboer iron on eBay
- Replies: 19
- Views: 3517
Re: PSA: Cheep Heyboer iron on eBay
the 337-0-337 PT has 3.5 secondaries with only 3A. It says its 40 Watts and good for EL34. Isn't the 3A a little light for EL34s?
- Sat Jan 02, 2016 11:10 pm
- Forum: Technical Discussion
- Topic: capacitor ripple current
- Replies: 8
- Views: 1216
Re: capacitor ripple current
Thanks R.G.! Thanks guys!
- Fri Jan 01, 2016 5:11 pm
- Forum: Technical Discussion
- Topic: capacitor ripple current
- Replies: 8
- Views: 1216
capacitor ripple current
Hey guys. I'm hoping someone can tell me what an ecap's ripple current spec means and whether that value should be high or low. I assume it is the amount of internal AC current the cap can handle, that it varies inversely with the cap's ESR (and other things like temperature), and that it should be ...
- Fri Jan 01, 2016 4:23 pm
- Forum: Marshall Discussion
- Topic: Marshall Based Hi Gain Prototype
- Replies: 5
- Views: 1681
Re: Marshall Based Hi Gain Prototype
sounds great!
- Tue Dec 29, 2015 3:06 pm
- Forum: Technical Discussion
- Topic: So, NFB Is Good, But......?
- Replies: 28
- Views: 5454
Re: So, NFB Is Good, But......?
Gene - 1. Home amp settings often don't cut through the mix in a band setting. Have you tried cranking the mids in a live setting to cut through? Maybe you need to alter your tone stack values too (e.g., replace 25k mid pot with 50k). 2. I think the Reason Bambino uses the same cathode-biased 6AQ5 p...