agedhorse

On 06/01/2024 at 00:38, Beedster said:

Thanks for your help @sandy_r and @Downunderwonder. Quick answer to some of the above; as far as I know I haven't used monster cables, and despite @Steve Browning very very kindly sending me a Mesa footswitch a while back I was never able to use it as apparently there were two version of the M-Pulse (I meant to open a thread here asking whether the cables could be switched but for some reason never got around to it). I think examining toggle positions might be helpful if Russ has the time and patience to do so, if not I'll continue this once I've collected the rig 👍

 

I have a strong sense that something I was doing here has led to these problems with the two previously trouble-free units, although much like the final scene of Burn After Reading (which if you've not see you really should), I'm damned if I know what the hell it was 🤔 

 

Thanks again folks 👍

Do the two foot switches say M-Pulse? Do they have the same number of pins on the DIN connector? 

Try the valve before screwing with anything else. 
 

I don’t recall if all M-Pulse models used the same foot switch or if there were differences. I will look to see if I can find the info, but don’t attempt to bodge something together because the switching system could be damaged by an incorrect connection. This was from an era when a lot of changes were happening to our entire switching protocols (including guitar amps).

Almost certainly the valve with the white getter coating.

Solder is lead free. Note that it’s a custom bushing diameter. The correct part is available from the factory. 
 

I haven’t heard how the follow-up service network will be implemented yet. I will post the information when it becomes available.

There are quite a few possibilities, but by far the most common cause is the amp falling on its face.

We are in the process of setting up a new service network throughout Europe, including several in the UK. 
 

The factory is closed for the holidays, but I can contact one of my coworkers to find a service solution for you. 
 

You can message me and I will get you the info. 

Just a general note… never use anything abrasive on these jacks, the plating is microns thick. 

On 18/12/2023 at 12:46, barkin said:

How does dirt/oxidisation on the barrel (or ring/tip contacts) of a jack socket cause problems if there's normally nothing plugged in to it? 

 

More likely the problem's on the (normally made) switching contacts, and breaking them a few times by inserting a jack plug cleans the contacts sufficiently to get rid of the problem. No gloop squirting required - although I guess some of it may find its way to where it's really needed. 

Correct 

Don’t give it a wallop, only the tiniest amount possible or you can create new problems when the “cleaner” gets into places it doesn’t belong.

Power quality varies in the US just the same as in the EU and UK. 
 

For an audio product to be compliant to the IEC 62368 standard (Europe), it must be able to operate at the nominal voltage +/-10%. In the UK, the mains voltage is officially 230V +10/-6% which makes the legacy 240V harmonize with the EU’s 230V +/-10%.

The required high line testing, if the product is approved for 240V markets (like AU/NZ) is 264V. If limited to 230V markets it would be 253V.

Power conditioners are in general, non-solutions to problems that need to be correctly fixed, and also are markets to extract the most money possible from purchasers.

9 hours ago, Hacksawbob said:

Still learning and trying to help. Thanks for your input. Do you think 115 refers to the 110v mains input? Back in the thread it was suggested to get a board from a 115 model and swap it in as there was one on ebay.

 

 

No, it’s part of the 115V/230V configuration circuitry. Hook the 115V version up to 230V and the power supply will fail spectacularly. 
 

There may be other differences in addition to the jumper(s), so be aware of this before making any assumptions.

Good grief, if you don’t know what you’re doing, leave it alone!!!
 

The 115 refers to the line voltage configuration of the SMPS, not the speaker model. 
 

To the comment about SMPS being too noisy for audio applications, look around at the highest quality audio applications and you will see SMPS. Limited experience results in limited knowledge.

I haven't seen any noise complaints form these pedals.

That said, power supply noise can be an issue with pedals in general, because most of them use switchmode power supplies plus switching regulators, so under some conditions there could be noise generated from the interaction of 2 or more switching frequencies.

Also, if there are pedals in front of the preamp, this can also introduce noise.

I see mode amps damaged by failed service attempts (where the problem actually had nothing do do with the amp) than amps that are just left alone. If it's working properly, leave it alone (IMO and IME).

On 25/09/2023 at 12:22, Pirellithecat said:

What would you say the differences are between the 800+ ,  TT800  are to the WD 800? 

I saw a band using a Subway 2x15 with the WD800 over the weekend, and I have to say it was "the sound" I have in my head.   I've played the same venue and of course my memory may be a bit dodgy but it sounded far better than my set up.  I guess it could be talent though!!   

3 different tone families. The D-800+ is the most neutral of the three, and if you are looking for a simple, straight ahead bass amp, it's the easiest to get along with. The WD-800 is modeled after the old Walkabout , it is native voicing is that tone and also that feel in varying degrees. It also has more extensive EQ and a damping factor selector. The TT-800 is a 2 channel amp and is modeled after the Subway D-800+ voicing on the Subway channel and the Bass 400+ on the Boogie channel. The Boogie channel is pretty significantly voiced, the Subway channel is more neutral. Both the WD and TT use tube preamps.

13 hours ago, sandy_r said:

 

 

Your concern, for possible misapplication of this question & answers about the GP11 preamp to other TE systems which contain power supplies operating at greater then 20x the OP equipment here, is very worthy

 

Now - let's be clear for this actual question:

 - The OP equipment 240V mains fuse (in series with the power switch) is rated at 100mA (ie. 0.1A) by TE;

 - The OP suggested switch is a suitable replacement for the OP power switch

 

ATTN.  Everybody else possibly thinking of replacing a power switch in some different setup: YMMV

 

Keep Calm and Carry On, Kev

 

Yes, of course in this case it’s fine but the GP-11 pre was used in in many other amp models too, and that wasn’t clear from the original post. This was a common mistake made when customers were asking for manufacturer support… the first question was always “stand alone preamp or one of the amp models with the GP-11 preamp”?

17 hours ago, sandy_r said:

 

The TE Service spec for the GP11 Preamp with 240V input, specifies a 100mA rated fuse in series with this switch

 

The  switch example shown in Kev's  link earlier (thermal  current rating, Ith, of 3A) meets and exceeds the indicated requirement

 

Correct, I was addressing this in general since the GP-11 preamp is used in many of the amps also, and it would be easy for somebody later on looking at this thread to misinterpret the information being presented. Some of those amps for the 230/240V market are fused at 3.15A or higher which is why I mentioned it. For other markets, the 125V rating (inductive) is what's important, and these amps can be fused at 6A or higher depending on  the model. 

For example, the GP-11 AH500 is fused at 5A for the 240V market and 10A for the 120V market.

The switch that was posted is rated at 2 amps inductive because that's how it's being used. The resistive or thermal current rating does NOT apply in this application since the load is inductive.

I used to work as an engineer for one of the previous owners of Trace Elliot so I am very familiar with the technical details of the line (during that era anyway, the current owner's versions are entirely different).

Note that the switch is only rated for 2A (inductive, which is what the power supply presents to the switch). The device should be fused at 2A or less.

8 hours ago, sPiKi said:

Brace yourself for the prices, I'd imagine. 

I have no idea what the pricing will be, but the exchange rate certainly isn't going to help any...

Correct, it’s all connected to the opening of the new Gibson Garage showroom in London. I believe some products (specifically bass) are already on the water.

Home brew equipment doesn't matter unless somebody gets hurt... then it matters a lot.

If you have damaged SpeakOn jacks, the first thing to check is that you are not using knock-off Chinese SpeakOn plugs. Some of these can damage the mating jacks, and if this is the cause, the repaired devices are at risk. 

11 hours ago, Steve Browning said:

 

Thanks. I've been on board for a couple of years or so. I was originally supported by Kris, and Trent passed on my details when he moved on.

Kris and Trent are still with us, Garey moved on but I still talk with him from time to time and is still informally part of our team. 

11 hours ago, Steve Browning said:

 

That's good. I've just been passed to an artist relations team in the UK, so I guess it's all about to open up again here.

Excellent, welcome aboard!

It's a long and complicated process and Gibson wants to have everything in place. 

I was at the factory the other day and was impressed with the amount of product destined for Europe. I don't know the scheduling, but now I better understand the reasons for the continuing delays. The guitar side will also be represented in this launch, and there's a proverbial crap-load of amps/cabinets being built for that market too. We are talking about months of production resources currently being dedicated to Europe (and AU/NZ).

On 19/09/2023 at 23:39, Phil Starr said:

Does that mean you expect Eminence manufacturing to move overseas, maybe to Italy or South Asia?

I don't know.