In a message dated 25/07/2005, system98765@............. writes:

Are  there ever any long period sensors available? Seems like the vertical
ones  get homes often.
Hi there,
 
    Most amateurs build their own Lehmans or  Shackelford Gundersens. Some ex 
professional long period equipment is available.  Some can be converted to 
broad band operation, but this takes constructional and  electronic skills.
    I hope to publish a new 'bolt it together' Lehman  design in the next 6 
weeks.
 
    Regards,
 
    Chris Chapman

 





In a message dated 25/07/2005, system98765@............. writes:
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  style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size=
=3D2>Are=20
  there ever any long period sensors available? Seems like the vertical
o=
nes=20
  get homes often.
Hi there,
 
    Most amateurs build their own Lehmans or=20
Shackelford Gundersens. Some ex professional long period equipment is availa=
ble.=20
Some can be converted to broad band operation, but this takes constructional=
 and=20
electronic skills.
    I hope to publish a new 'bolt it together' Lehm=
an=20
design in the next 6 weeks.
 
    Regards,
 
    Chris Chapman