DAV BG1--what do transport it in?

[mandodon]

What are you putting it in to transport it and store it? It's kind of an odd shape/size.

Just got mine and looking forward to putting it to use.

[Plush]

I carry mine in a baby blue
Fortnum & Mason bag.

[Tom Higgins]

Originally Posted by Plush

I carry mine in a baby blue
Fortnum & Mason bag.

... costing as much as the unit

[Plush]

It's a shopping bag, baby. It originally contained some fish.

[thehightenor]

Originally Posted by Plush

It's a shopping bag, baby. It originally contained some fish.

.... for your DAB BG1

Sorry couldn't resist.

tht

[Tom Higgins]

I guess you're excused then

[mandodon]

I guess I'll check the office supply stores for a small storage tub with a lid. None of the ones I have here are long enough to fit it.

[Jim Williams]

I put in the Analog Devices SSM2019 preamp chip. I put in 100uf 50V Panasonic FR input caps with Wima MKP-2 film bypasses. I removed the 47 ohm input resistors, not needed with the stable SSM2019, that lowers noise. I replaced them with ferrite beads for rf protection.

Older models used OP275 output opamps, later models were seen with Motorola MC33078 opamps. LME49860NA duals are a good retrofit.

[rumleymusic]

I put in the Analog Devices SSM2019 preamp chip. I put in 100uf 50V Panasonic FR input caps with Wima MKP-2 film bypasses. I removed the 47 ohm input resistors, not needed with the stable SSM2019, that lowers noise. I replaced them with ferrite beads for rf protection.

Older models used OP275 output opamps, later models were seen with Motorola MC33078 opamps. LME49860NA duals are a good retrofit.

LMAO. "What do you put it in", not "what to you put in it."

I thought they were using THAT chips now. Is the SSM2019 much better?

[uncle duncan]

Office Depot sells various different sizes of black plastic boxes with clamp-on lids. I use several for my gig stuff and DVD storage in the studio.

Really Useful Boxes 100percent Recycled Storage Box 17 Liter 7 H x 14 W x 19 D Black by Office Depot

[mandodon]

I finally tested the BG1 out on my mandolin. It's the first good pre I've owned and I'm really impressed with it--just sounds amazing.

Next trip to the big city, I'll find some kind of decent sealable box for it.

[fifthcircle]

Any gear that I own that does not have a good enough case goes in a Pelican case. They come in lots of different sizes and shapes- it isn't hard to find one that works for just about anything. They are nearly indestructable and they have a lifetime warranty on them so if anything does happen to them, a free replacement will be made.

--Ben

[Jim Williams]

Originally Posted by rumleymusic

LMAO. "What do you put it in", not "what to you put in it."

I thought they were using THAT chips now. Is the SSM2019 much better?

It is. The that 1510 is borderline stable in the ver. 3 DAV. If you remove the 47 ohm input resistors, oscillations are found. The SSM2019 is cleaner and is absolutely stable, even when raising the operational bandwidth in the ver. 3 DAV. It is the my recommended replacement part for those preamps, plug one in and find out yourself, if you can twist a screwdriver. Digi Key has them or you can order a free sample from:
Analog Devices | Semiconductors and Signal Processing ICs

[panatrope]

Originally Posted by Jim Williams

The SSM2019 is cleaner and is absolutely stable, even when raising the operational bandwidth in the ver. 3 DAV.

In your view, is this comparison also valid against the 1512, which appears to be closer in specs to the 2019?

[Nobilmente]

Originally Posted by Jim Williams

I put in the Analog Devices SSM2019 preamp chip. I put in 100uf 50V Panasonic FR input caps with Wima MKP-2 film bypasses. I removed the 47 ohm input resistors, not needed with the stable SSM2019, that lowers noise. I replaced them with ferrite beads for rf protection.

Older models used OP275 output opamps, later models were seen with Motorola MC33078 opamps. LME49860NA duals are a good retrofit.

Hi Jim
i've never used an mc33078 op amp!
all signal i.c's are now in 8 pin bases for ease of replacement/modification.
regards
Mick @DAV

I think it must be Groundhog day or something.

Above is a response Mick Hinton made to you quite some time ago - I know I have mentioned this about four or five times.

If you find you have one of these Motorola chips it is because someone swapped it around in there, these have never been used in original DAV preamps.

[Nobilmente]

Originally Posted by rumleymusic

LMAO. "What do you put it in", not "what to you put in it."

I thought they were using THAT chips now. Is the SSM2019 much better?

I spoke to Mick Hinton about the change he made from AD2019's to THAT1510 at the time he made the change. His comment to me was that he was getting quite a number of 2019's through that he did not consider usable (I think from the position of spec.) and was throwing away far too many of them. He also commented that he regarded the THAT1510 a better i.c.

If I recall the THAT1510 is also quieter than the AD2019, although I'm working from memory here, I'd need to check this to be sure.

If you have a BG1 with THAT1510 in it, it's there because the designer put it there, and if I am not mistaken the OP275 is still used at the output. All of my BG1's have the OP275 at the output.

[Nobilmente]

Originally Posted by mandodon

What are you putting it in to transport it and store it? It's kind of an odd shape/size.

Just got mine and looking forward to putting it to use.

If I use the BG1's at the base of the stands during recording, I often put them inside of a cardboard box with the leads just looped inside and coming out over the top of the box. This way, if someone decides to play football with the amp it is secure inside of the box.

For carrying I use an aluminium camera case, although I will be putting them on a shelf and into their own 19" rack mount later on. It's just that there are 1001 things to do, and doing that keeps being put further back in time (or should that be forward?!)

A bricklayer's hod might be handy too!!!

[Jim Williams]

Originally Posted by Nobilmente

I think it must be Groundhog day or something.

Above is a response Mick Hinton made to you quite some time ago - I know I have mentioned this about four or five times.

If you find you have one of these Motorola chips it is because someone swapped it around in there, these have never been used in original DAV preamps.

Round and around we go again. The last 3 DAV's that have come in all had MC33078 dual opamps fitted. The owners bought them new and never opened them. The power supply was also lowered to + - 18 volts when older version DAV's fitted with OP275 output opamps were run at + - 20 volts. If you use National LME49860NA's, you can reset the power supply back up to + - 20 volts for additional headroom. It is a superior part to the 20 year old OP275 Butler opamp.

Like I said, if you have an ounce of curiosity and can twist a screwdriver, you can find the part that pleases you best. I've offered all the choices here for you. If you can work a mouse, you can get some of this stuff as free samples, delivered right to your front door. How easy is that? Or, just get a SCA T-15 kit for $89 and pocket the savings. They do a very nice design job with those chips with input and output servos, no caps, mamm.

Or, just read more gearslutz.

[Nobilmente]

Well, Mick Hinton has not made many contributions to this forum, but I do know that he has gone out of his way to correct you on this business with the Motorola i.c., so he must have felt moved to do so.

I'm prepared to take the man's word for it, I can't imagine he would waste his time doing so if it were not the case. He specifically stated he has never used the Motorola i.c.