Dubs Posted February 9, 2010 Share Posted February 9, 2010 (edited) I'm trying to rack a tuner and amp that are 1u and 3u each in a 4u Boschma rack, BUT... the Boschma rack that I'm using only has screw spaces for each 1u unit rather than every single screw space. The problem I've got is that the 3u amp that I'm trying to rack has its screw spaces half a step out of sync with 'normal' 1u spaces so I need to have a rack with screw spaces in every single gap in order to be able to rack both the tuner and amp together. If you're still with me... ... is it possible to change the rack spaces on the Boschma racks or should I just give up and buy a new rack with screw spaces at every half unit space? If I've not explained myself very well I'll try and find pics for examples of what I'm getting at. Thanks in advance... Edited February 9, 2010 by Dubs Quote Link to comment Share on other sites More sharing options...
Dubs Posted February 9, 2010 Author Share Posted February 9, 2010 Anyone? Quote Link to comment Share on other sites More sharing options...
51m0n Posted February 9, 2010 Share Posted February 9, 2010 Time to buy a nice drill and thread tapping set? Quote Link to comment Share on other sites More sharing options...
obbm Posted February 9, 2010 Share Posted February 9, 2010 I understand the problem. Whats the amp? Quote Link to comment Share on other sites More sharing options...
BassBod Posted February 9, 2010 Share Posted February 9, 2010 I've always had the same problem with SWR stuff - they try to make you put a 2U box in a 3U space (by spacing the mounting holes) so there is plenty of air for cooling. You can drill new holes in the amp, or get a different rack strip/case. The SKB cases use more holes and I think the Thomman ones have "loose" fittings that can slide around. Its a pain, but not impossible. Quote Link to comment Share on other sites More sharing options...
obbm Posted February 9, 2010 Share Posted February 9, 2010 Having had a look at Boschma it would seem that their rack strip does not comply with the international standards as it doesn't have the intermediate holes. Then again from what you say the amp wants to use the intermediate holes which is a US thing and goes against accepted custom and practice. As already stated you either make new holes in the rack strip, make new holes in the amp ears or get a new case. Historically there were 2 standards, EIAJ (Japan/USA) and DIN/BSS for Europe. Now there is one but not everyone complies. I had an Ashdown LG1000 a year ago and the holes in the rack brackets were non-compliant. I told them but they ignord me as usual. Quote Link to comment Share on other sites More sharing options...
wateroftyne Posted February 9, 2010 Share Posted February 9, 2010 Hello! I think this is what I had... [url="http://basschat.co.uk/index.php?showtopic=19156&hl=boschma"]http://basschat.co.uk/index.php?showtopic=...&hl=boschma[/url] Quote Link to comment Share on other sites More sharing options...
Dubs Posted February 9, 2010 Author Share Posted February 9, 2010 Cheers for the responses guys. I'm really not keen to do any drilling of holes on either the amp or rack as I was kind of after a way of just swapping out the standard 1u screw spaces and replacing them with ones at every half unit space. Here's a couple of pics to illustrate the issue. obbm & BassBod - It is indeed a 3u SWR Bass 750... why do they do that?! Quote Link to comment Share on other sites More sharing options...
Dubs Posted February 9, 2010 Author Share Posted February 9, 2010 [quote name='obbm' post='740200' date='Feb 9 2010, 05:50 PM']Having had a look at Boschma it would seem that their rack strip does not comply with the international standards as it doesn't have the intermediate holes. Then again from what you say the amp wants to use the intermediate holes which is a US thing and goes against accepted custom and practice. As already stated you either make new holes in the rack strip, make new holes in the amp ears or get a new case. Historically there were 2 standards, EIAJ (Japan/USA) and DIN/BSS for Europe. Now there is one but not everyone complies. I had an Ashdown LG1000 a year ago and the holes in the rack brackets were non-compliant. I told them but they ignord me as usual. [/quote] [quote name='wateroftyne' post='740205' date='Feb 9 2010, 05:53 PM']Hello! I think this is what I had... [url="http://basschat.co.uk/index.php?showtopic=19156&hl=boschma"]http://basschat.co.uk/index.php?showtopic=...&hl=boschma[/url][/quote] Cheers guys, very helpful Quote Link to comment Share on other sites More sharing options...
obbm Posted February 9, 2010 Share Posted February 9, 2010 The international standard is shown at [url="http://en.wikipedia.org/wiki/19-inch_rack"]http://en.wikipedia.org/wiki/19-inch_rack[/url]. Those SWR mounting holes certainly do not comply and look like a hangover from the old US standard. What is the actual spacing between them and from the top and bottom of the bracket? I suggest you find a case with sliding, completely adjustable fixings. Quote Link to comment Share on other sites More sharing options...
Finbar Posted February 10, 2010 Share Posted February 10, 2010 Should it not be possible to drill the rack in the new desired position, and then secure it from behind just like with a gator rack? I know you're not keen on getting it drilled, but it won't affect the performance of the case should you decide to swap back. Quote Link to comment Share on other sites More sharing options...
JimBobTTD Posted February 10, 2010 Share Posted February 10, 2010 [quote name='obbm' post='740238' date='Feb 9 2010, 07:23 PM'][...] I suggest you find a case with sliding, completely adjustable fixings.[/quote] I got one of them - a Rockcase. Very sturdy piece of kit, and quite generous too. My 6u rack takes the six units and has wiggle room for some cables to go between a couple of units. Nice. Scored it from [url="http://www.music-town.de/"]Music Town[/url] in Germany who were the cheapest at the time (for Sweden). Quote Link to comment Share on other sites More sharing options...
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