[Amps] Real time tests to see if an RF transformer is saturating?

[Chris Wilson]

Hello Alan / Manfred,


Do you thinking this size core is over the top in the combiner, I don't
mind the cost if it has good overhead, but maybe using more wire
length on a (much) bigger core has negatives I am unaware of. I am
planning a GS35b tube amp on LF, but for now this twin FET amp
combining is working well, if inefficiently heating the shack as well!

http://uk.rs-online.com/web/p/ferrite-rings/4956317/

Thanks.



On Monday, May 15, 2017,  you wrote:

> Chris,

> Buy Fair-rite toroids from mouser.co.uk (post free over, I think, £20 or
> maybe £25), or uk.rs-online.com who are always post free. Both add VAT
> to their catalogue prices.

> The pros don't use designators like FT240-78. Those are numbers from the
> USA reseller Amidon. You have to search on www.fair-rite.com for the 
> long string of digits (like 5978003801) and type that into the Mouser or
> RS search box. Finding the right part on Fair-rite is a pig. There are
> drop downs under Products on the home page but it's never easy.

> If I was in your shoes I'd try type 78 and wind on as many turns in a 
> 5:7 ratio as will fit. As Manfred says, several strands of thinner wire
> bundled together will be easier to wind and have a bit less copper loss.

> Have fun. Almost no radio amateurs of any callsign series understand 
> magnetics so you are becoming an expert in the hobby!

> 73, Alan






-- 
Best regards,
 Chris                            mailto:chris at chriswilson.tv