Hi Steve, No brand. They are HC-49S. 73, Hugh Sent from my iPad > On 31/01/2014, at 5:08 pm, "Steve VK2SJA" <vk2sja@xxxxxxxxxxx> wrote: > > Hi Hugh, > > Just out general interest... > > What brand form factor are they? In particular are they HC-49 or the > smaller half sized HC-49S? > > 73, Steve. > > >> How closely do the crystals need to be matched in frequency? >> >> I obtained 40 crystals from Ebay but the spread of frequency for the >> closest 8 crystals is nearly 200Hz. Should I buy more or is this good >> enough? >> >> Thanks in anticipation of reply. >> >> 73 >> Hugh >> ZL1UEM >> >> Sent from my iPad > > >