Muller Dynamo

[neptune]

@Mondrasek . I would guess that AM radios are not all that common in the USA nowadays . Try Garage sales , charity shops , or maybe ask old people if they have one you could borrow .

[gyulasun]

Well,   here is a US$ 20 offer for LW, MW and 9 SW bands plus FM (88-108MHz):

http://www.ohiofire.com/World-Band-AM-FM-LW-SW-Radio-CBYCXCB12.htm

manufacturer site on this type:
http://www.cobyusa.com/?p=prod&prod_num_id=152&pcat_id=1008

image on the set: http://www.cobyusa.com/files/hi_res/CXCB12_HR.jpg

As usual, Amazon has it for almost half price:
http://www.amazon.com/dp/B00006JPF8/ref=asc_df_B00006JPF81636542?smid=A2NYACAJP9I1IY&tag=nextagusmp0351024-20&linkCode=asn&creative=395105&creativeASIN=B00006JPF8 

Gyula

[mondrasek]

Well,   here is a US$ 20 offer for LW, MW and 9 SW bands plus FM (88-108MHz):
As usual, Amazon has it for almost half price:
http://www.amazon.com/dp/B00006JPF8/ref=asc_df_B00006JPF81636542?smid=A2NYACAJP9I1IY&tag=nextagusmp0351024-20&linkCode=asn&creative=395105&creativeASIN=B00006JPF8 

Well that is too cheap to pass up if it can help us learn anything.

On order.

Thanks, Gyula!

M.

[plengo]

http://www.youtube.com/watch?v=iJsVSMQqCOM&feature=digest

[slapper]

thanks plengo.

i'm curious as to what others have observed concerning the length of exposed
core toward the rotor. all i see is more lugging with exposed core and i don't
think i'm seeing anymore voltage with the extra exposed lengths.

coarse this is fraught with several variables but wondering if there could be
an overall consensus with exposed core lengths.

seems another lug factor is distance of the genset coils from the rotor mags
especially with the back bias mags in place. the closer i get to the rotor i see a
reduction in speed and when turning by hand i feel another set of cogging with
virtual poles.

it appears to me that overall performance is increased when the end of the
genset coils are just out of range from the virtual pole exposure.

just some observations that play a role in determining the exposed core length.

the stability of that limb i'm reaching for depends on what others have observed
with the exposed core lengths.

take care.

nap