Howdy! I've seen this question asked before but I don't remember the answer. I'm puting a fuse on the AC line of my Silvertone 1828. Will a 1 amp work and what is the difference between "slo-blo" and "fast-blo"? Thanks!

:Howdy! I've seen this question asked before but I don't remember the answer. I'm puting a fuse on the AC line of my Silvertone 1828. Will a 1 amp work and what is the difference between "slo-blo" and "fast-blo"? Thanks!

Johnny: a radio will pull the most amperage at turn-on as the filaments heat up. A fast-blo fuse usually opens up under such conditions. A slo-blow fuse is what you want. Adding a CL-90 thermister also controls the inrush current since it has high resistance till it warms up and passes current and avoids a lot of stress on those valuable tubes.
Steve

::Howdy! I've seen this question asked before but I don't remember the answer. I'm puting a fuse on the AC line of my Silvertone 1828. Will a 1 amp work and what is the difference between "slo-blo" and "fast-blo"? Thanks!
:
:Johnny: a radio will pull the most amperage at turn-on as the filaments heat up. A fast-blo fuse usually opens up under such conditions. A slo-blow fuse is what you want. Adding a CL-90 thermister also controls the inrush current since it has high resistance till it warms up and passes current and avoids a lot of stress on those valuable tubes.
:Steve
:
:Thanks Steve!

:::Howdy! I've seen this question asked before but I don't remember the answer. I'm puting a fuse on the AC line of my Silvertone 1828. Will a 1 amp work and what is the difference between "slo-blo" and "fast-blo"? Thanks!
::
::Johnny: a radio will pull the most amperage at turn-on as the filaments heat up. A fast-blo fuse usually opens up under such conditions. A slo-blow fuse is what you want. Adding a CL-90 thermister also controls the inrush current since it has high resistance till it warms up and passes current and avoids a lot of stress on those valuable tubes.
::Steve
::
::Thanks Steve!

Steve:
In general, use fast blow on transistor circuits, slo blow on tubes.
Lewis

Lewis: Yes I know. But his situation was for a 7 tube radio. We don't get many transistor radio restorations here. Wish we did, but finding schematics for the 60's transistor radios is a bit more challenging.
best regards,
Steve

:Lewis: Yes I know. But his situation was for a 7 tube radio. We don't get many transistor radio restorations here. Wish we did, but finding schematics for the 60's transistor radios is a bit more challenging.
:best regards,
:Steve

Steve:
I was trying to say that tubes can stand a surge that will not blow a slo-blow fuse that would zap a transistor. And yes, the input surge of current going into a cold filament string could easily blow a fast blow fuse when there is no problem with the radio.
Lewis

::Lewis: Yes I know. But his situation was for a 7 tube radio. We don't get many transistor radio restorations here. Wish we did, but finding schematics for the 60's transistor radios is a bit more challenging.
::best regards,
::Steve
:
:Steve:
:I was trying to say that tubes can stand a surge that will not blow a slo-blow fuse that would zap a transistor. And yes, the input surge of current going into a cold filament string could easily blow a fast blow fuse when there is no problem with the radio.
:Lewis

:::Lewis: Yes I know. But his situation was for a 7 tube radio. We don't get many transistor radio restorations here. Wish we did, but finding schematics for the 60's transistor radios is a bit more challenging.
:::best regards,
:::Steve
::
::Steve:
::I was trying to say that tubes can stand a surge
that will not blow a slo-blow fuse that would zap a transistor. And yes, the input surge of current going into a cold filament string could easily blow a fast blow fuse when there is no problem with the
radio.

::Lewis

Steve, difference in slo blow and fast (actual regular)fuse is that slo blow designed to take an istantaneous overload momentarily without blowing whereas regular fuse blows as soon as ampereage exceeded. PL